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Loftus JR, Wassef C, Ellika S. Chiari I Deformity: Beyond 5 mm below the Foramen Magnum. Radiographics 2024; 44:e230227. [PMID: 39115997 DOI: 10.1148/rg.230227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
Although originally described as a consecutive series of pathologic changes, Chiari syndrome represents a spectrum of disease divided into two subsets: development deformities of the paraxial mesoderm manifesting after birth (types 0-1.5) and true congenital malformations due to failure of neural tube closure present in utero (types 2-5). Heterogeneity among patients with a Chiari deformity and incomplete understanding of its pathophysiologic characteristics have led to inconsistency in radiologic reporting and difficulty in defining appropriate management strategies tailored to an individual patient's condition. The radiologist is tasked with going beyond the criteria for cerebellar tonsillar herniation to define an individual patient's disease state, determine candidacy for surgery, and assist in selecting the proper surgical approach. In addition, the radiologist must be able to identify conditions that result in cerebellar tonsillar herniation that are not related to Chiari deformity to avoid inappropriate surgery. Last, the radiologist must be able to interpret postoperative imaging examinations to assess for adequacy of treatment and complications. The authors summarize recent literature regarding the pathophysiologic basis of Chiari 1 and related deformities and detail the ideal morphologic and physiologic imaging assessment, focusing on Chiari 1 and related deformities (Chiari 0, 0.5, and 1.5). Also discussed are surgical techniques and "pearls" of postsurgical imaging, including complications that must be recognized. This review provides clarity to a commonly encountered but less understood condition to optimize outcomes for patients with Chiari 1 and related deformities. ©RSNA, 2024 Supplemental material is available for this article. See the invited commentary by Huisman in this issue.
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Affiliation(s)
- James Ryan Loftus
- From the Department of Imaging Sciences, New York University Langone Health, 550 1st Ave, New York, NY 10016 (J.R.L.); and Departments of Neurosurgery (C.W.) and Imaging Sciences (S.E.), University of Rochester Medical Center, Rochester, NY
| | - Catherine Wassef
- From the Department of Imaging Sciences, New York University Langone Health, 550 1st Ave, New York, NY 10016 (J.R.L.); and Departments of Neurosurgery (C.W.) and Imaging Sciences (S.E.), University of Rochester Medical Center, Rochester, NY
| | - Shehanaz Ellika
- From the Department of Imaging Sciences, New York University Langone Health, 550 1st Ave, New York, NY 10016 (J.R.L.); and Departments of Neurosurgery (C.W.) and Imaging Sciences (S.E.), University of Rochester Medical Center, Rochester, NY
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Zhou LN, Xiao X, Chen XY, Gu SX, Liu XD, Shou JJ, Gu WT, Che XM, Zhao JL, Xie R. The Surgical Strategy Cerebrospinal Fluid Decompression Facilitates Outcomes of Adults with Chiari Malformation Type I: An Observational, Real-World, Single-Center Study of 528 Patients. World Neurosurg 2024:S1878-8750(24)01155-0. [PMID: 38986944 DOI: 10.1016/j.wneu.2024.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/30/2024] [Accepted: 07/01/2024] [Indexed: 07/12/2024]
Abstract
OBJECTIVE We designed this study to introduce the surgical strategy cerebrospinal fluid (CSF) decompression in treatment of Chiari malformation type I and compared CSF decompression with other surgical strategies to provide a solid basis for patient counseling. METHODS The study enrolled 528 consecutive patients with CMI who underwent surgical interventions from 2012 to 2022. The surgical strategy for these patients was bony and dural decompression, anatomical reduction of herniated tonsils, or CSF decompression. Short-term results were determined after 3 months; long-term outcomes were evaluated at last follow-up (at least 18 months). RESULTS CSF decompression was independently associated with better long- or short-term primary outcomes than anatomical reduction of herniated tonsils or bony and dural decompression (P < 0.001). Compared with short-term, the long-term outcomes were better in patients who underwent CSF decompression (P = 0.035), but were worse in patients with bony and dural decompression (P = 0.03). Specific surgical techniques cannot affect the long- and short-term outcomes of patients with Chiari malformation type I. CSF decompression provided better long-term syringomyelia improvement than short-term (181/218, 83% vs. 169/218, 77.5%; P < 0.001). CONCLUSIONS CSF decompression, but not a specific surgical technique or operative method, was associated with favorable neurological outcomes in ADULT patients with Chiari malformation type I. The surgical technique and operative method should be selected according to the characteristics of each patient and the intraoperative condition to normalize CSF circulation at the craniovertebral junction area. The intraoperative target, smooth CSF flow out from the fourth ventricle and in to the bilateral Luschka foramina, could be observed.
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Affiliation(s)
- Long-Nian Zhou
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiao Xiao
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Xing-Yu Chen
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Shi-Xin Gu
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiao-Dong Liu
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Jia-Jun Shou
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Wen-Tao Gu
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiao-Ming Che
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Jian-Lan Zhao
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China
| | - Rong Xie
- Department of Neurosurgery, National Center for Neurological Disorders, Neurosurgical Institute of Fudan University, Shanghai, China; Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China; Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration, Huashan Hospital, Fudan University, Shanghai, China.
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Zarrin D, Goel K, Kim WJ, Holly LT, Batzdorf U. Chiari Type I Revision Decompressive Surgery Indications and Operative Technique: Experience in a Large Adult Cohort. World Neurosurg 2024; 185:e1074-e1085. [PMID: 38490446 DOI: 10.1016/j.wneu.2024.03.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Chiari malformation is characterized by inferior displacement of the cerebellar tonsils through the foramen magnum, frequently resulting in strain related headaches, and motor/sensory dysfunction. Chiari decompression technique varies significantly, possibly contributing to frequent revisions. We reviewed revision Chiari decompressions at our institution to determine the primary indications for revision and outcomes after revision. METHODS We retrospectively reviewed patients who underwent revision of Chiari decompression at our institution from 2005 to 2020. Demographics, indications for revision surgery, operative techniques, imaging findings, and preoperative/postoperative symptoms were collected. χ2 test was performed to determine statistical significance using a P < 0.05. Independent predictors of operative outcomes were identified. RESULTS A total of 46 patients (91% females, mean age 38.8 years) were included for analysis. The median time to revision surgery was 69.1 months (range 0-364 months) with headache (n = 37, 80%) being the most commonly recurring symptom. Large craniectomy (n = 28, 61%) was the most frequent indication for revision surgery. Thirty-two (70%) patients underwent cranioplasty, 20 (43%) required duraplasty, 15 (33%) required arachnoid dissection, and 15 (33%) required tonsillar reduction during revision surgery. Postrevision follow-up (at 8.9 ± 5.2 months average, range 1-18 months), revealed an average reduction in all Chiari-related symptoms relative to symptoms before the revision. CONCLUSIONS The most common indication for revision Chiari decompression was a large craniectomy resulting in cerebellar ptosis. We found that tonsillar reduction paired with modest craniectomy achieved near-complete resolution of symptoms with minimal complications. For patients with recurrent or persistent sequelae of Chiari malformation after decompression, revision may reduce symptom severity.
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Affiliation(s)
- David Zarrin
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Keshav Goel
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Wi Jin Kim
- Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California, USA
| | - Langston T Holly
- Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California, USA
| | - Ulrich Batzdorf
- Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California, USA.
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Yuan C, Xia P, Duan W, Wang J, Guan J, Du Y, Zhang C, Liu Z, Wang K, Wang Z, Wang X, Wu H, Chen Z, Jian F. Long-Term Impairment of the Blood-Spinal Cord Barrier in Patients With Post-Traumatic Syringomyelia and its Effect on Prognosis. Spine (Phila Pa 1976) 2024; 49:E62-E71. [PMID: 38014747 DOI: 10.1097/brs.0000000000004884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 11/05/2023] [Indexed: 11/29/2023]
Abstract
STUDY DESIGN Cohort study. OBJECTIVE The aim of this study was to explore the association between blood-spinal cord barrier (BSCB) markers and other factors associated with an unfavorable outcome among patients with post-traumatic syringomyelia (PTS) who achieved successful intradural adhesion lysis (IAL). SUMMARY OF BACKGROUND DATA Only approximately half of PTS patients receiving IAL have a favorable outcome. PATIENTS AND METHODS Forty-six consecutive patients with PTS and 19 controls (CTRL) were enrolled. All PTS patients underwent physical and neurological examinations and spinal magnetic resonance imaging before and 3 to 12 months after IAL. All patients underwent myelography before surgery. BSCB disruption was detected by increased intrathecal and serum concentrations of albumin, immunoglobulin (Ig)G, IgA, and IgM. A multivariable analysis was performed with a logistic regression model to identify factors associated with unfavorable outcomes. Receiver operating characteristic curves were calculated to investigate the diagnostic value of biomarkers. RESULTS The ages and general health of the PTS and CTRL groups did not differ significantly. QAlb, IGAQ, IGGQ, and IGMQ was significantly higher in PTS patients than in controls ( P =<0.001). The degree of intradural adhesion was significantly higher in the unfavorable outcome group than in the favorable outcome group ( P <0.0001). QAlb, immunoglobulin (Ig)AQ, IGGQ, and IGMQ was significantly correlated with clinical status ( R =-0.38, P <0.01; R =-0.47, P =0.03; R =-0.56, P =0.01; R =-0.43, P =0.05, respectively). Higher QAlb before surgery (odds ratio=2.66; 95% CI: 1.134-6.248) was significantly associated with an unfavorable outcome. The receiver operating characteristic curve analysis demonstrated a cutoff for QAlb higher than 10.62 with a specificity of 100% and sensitivity of 96.3%. CONCLUSION This study is the first to detect increased permeability and BSCB disruption in PTS patients. QAlb>10.62 was significantly associated with unfavorable clinical outcomes following intradural decompression. LEVEL OF EVIDENCE Level III-prognostic.
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Affiliation(s)
- Chenghua Yuan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Pingchuan Xia
- Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Wanru Duan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Jiachen Wang
- Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jian Guan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Yueqi Du
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Can Zhang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Zhenlei Liu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Kai Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Zuowei Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Xingwen Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Hao Wu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Zan Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Fengzeng Jian
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
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Xia P, Lv H, Yuan C, Duan W, Wang J, Guan J, Du Y, Zhang C, Liu Z, Wang K, Wang Z, Wang X, Wu H, Chen Z, Jian F. Role of Preoperative Albumin Quotient in Surgical Planning for Posttraumatic Syringomyelia: A Comparative Cohort Study. Neurospine 2024; 21:212-222. [PMID: 38317552 PMCID: PMC10992642 DOI: 10.14245/ns.2347152.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 02/07/2024] Open
Abstract
OBJECTIVE Surgical procedures for patients with posttraumatic syringomyelia (PTS) remain controversial. Until now, there have been no effective quantitative evaluation methods to assist in selecting appropriate surgical plans before surgery. METHODS We consecutively enrolled PTS patients (arachnoid lysis group, n = 42; shunting group, n = 14) from 2003 to 2023. Additionally, 19 intrathecal anesthesia patients were included in the control group. All patients with PTS underwent physical and neurological examinations and spinal magnetic resonance imaging preoperatively, 3-12 months postoperatively and during the last follow-up. Preoperative lumbar puncture was performed and blood-spinal cord barrier disruption was detected by quotient of albumin (Qalb, cerebrospinal fluid/serum). RESULTS The ages (p = 0.324) and sex (p = 0.065) of the PTS and control groups did not differ significantly. There were also no significant differences in age (p = 0.216), routine blood data and prognosis (p = 0.399) between the arachnoid lysis and shunting groups. But the QAlb level of PTS patients was significantly higher than that of the control group (p < 0.001), and the shunting group had a significantly higher QAlb (p < 0.001) than the arachnoid lysis group. A high preoperative QAlb (odds ratio, 1.091; 95% confidence interval, 1.004-1.187; p = 0.041) was identified as the predictive factor for the shunting procedure, with the receiver operating characteristic curve showing 100% specificity and 80.95% sensitivity for patients with a QAlb > 12.67. CONCLUSION Preoperative QAlb is a significant predictive factor for the types of surgery. For PTS patients with a QAlb > 12.67, shunting represents the final recourse, necessitating the exploration and development of novel treatments for these patients.
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Affiliation(s)
- Pingchuan Xia
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Houyuan Lv
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Chenghua Yuan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Wanru Duan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | | | - Jian Guan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Yueqi Du
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Can Zhang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Zhenlei Liu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Kai Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Zuowei Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Xingwen Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Hao Wu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Zan Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
| | - Fengzeng Jian
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Lab of Spinal Cord Injury and Functional Reconstruction, China International Neuroscience Institute (CHINA-INI), Beijing, China
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6
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Moniruzzaman S, Kaipainen A, Tervonen J, Huttunen J, Jyrkkänen HK, Huuskonen TJ, Rantala S. Long-term outcome of operated Chiari I patients between 2005 and 2020 in Eastern Finland. Acta Neurochir (Wien) 2024; 166:115. [PMID: 38416251 PMCID: PMC10902000 DOI: 10.1007/s00701-024-05999-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 02/06/2024] [Indexed: 02/29/2024]
Abstract
PURPOSE The purpose of our study was to examine the long-term outcomes of operated Chiari malformation type 1 (CM1) patients and evaluate whether different duraplasty techniques affected outcome after surgery in Kuopio University Hospital catchment area. METHODS In this retrospective study, a total of 93 patients were diagnosed with CM1 and underwent posterior fossa decompression surgery with or without duraplasty between 2005 and 2020. All patients' medical records were examined for baseline characteristics, surgical details, and long-term follow-up data after operation. RESULTS The mean age of CM1 patients was 25.9 years (SD 19.2 years), with female preponderance 69/93 (73.4%). The mean clinical follow-up time was 26.5 months (SD 33.5 months). The most common presenting symptoms were headache, symptoms of extremities, and paresthesia. Posterior fossa decompression with duraplasty was performed in 87 (93.5%) patients and bony decompression in 6 (6.5%) patients. After surgery, preoperative symptoms alleviated in 84.9% (79/93) and the postoperative syringomyelia regression rate was 89.2% (33/37) of all patients. The postoperative complication rate was 34.4% (32/93), with aseptic meningitis being the most common, 25.8% (24/93). Revision surgery was required in 14% (13/93) of patients. No significant correlation between postoperative outcome and extent of dural decompression, or type of duraplasty performed was found. CONCLUSION This is the largest reported series of surgically treated CM1 patients in Finland. Posterior fossa decompression is an effective procedure for CM1 symptomology. Duraplasty technique had no significant difference in complication rate or long-term outcomes.
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Affiliation(s)
- Samir Moniruzzaman
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.
| | - Aku Kaipainen
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Joona Tervonen
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Jukka Huttunen
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Henna-Kaisa Jyrkkänen
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Terhi J Huuskonen
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Susanna Rantala
- Neurosurgery KUH NeuroCenter, Kuopio University Hospital, Faculty of Health Sciences, School of Medicine, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
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7
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Aydin L, Dereli D, Kartum TA, Sirinoglu D, Sahin B, Eksi MS, Musluman AM, Yilmaz A. Management of Persistent Syringomyelia in Patients Operated for Chiari Malformation Type 1. World Neurosurg 2024; 182:e360-e368. [PMID: 38013110 DOI: 10.1016/j.wneu.2023.11.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 11/22/2023] [Indexed: 11/29/2023]
Abstract
BACKGROUND The treatment of persistent syringomyelia associated with Chiari malformation type 1 (CM1) is unclear. This study aims to evaluate the clinical and radiologic outcomes of syringo-subarachnoid shunt (SSS) as a treatment for persistent syringomyelia following posterior fossa decompression (PFD) for CM1. METHODS Forty-nine cases treated for CM1 associated syringomyelia at a single center were analyzed, 17 of them undergoing reoperation due to persistent syrinx formation. The patients' demographic data, neurologic presentations, and radiologic results were analyzed, including cerebellar herniation, posterior fossa volume, the level at which the syrinx started and finished, the size and diameter of the syrinx. RESULTS Seventeen patients underwent SSS placement, with 1 minor surgical complication (a cerebrospinal fluid leak) occurring and requiring revision. No morbidity or mortality was observed. Among these 17 reoperated patients, partial or complete resorption of the syrinx was observed in all cases. The results suggest that if the syrinx diameter is >10 mm at its thickest point, extends for more than 10 vertebrae, and starts from the upper cervical region and extends to the upper thoracic region, the syrinx may not regress after the first surgery and potentially predicting the need for a second operation before PFD. CONCLUSIONS SSS placement for persistent syrinx following PFD for CM1 is a safe and effective surgical treatment method. These criteria may also help predict the need for a second surgery and the overall disease outcome for both the surgeon and patient.
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Affiliation(s)
- Levent Aydin
- Department of Neurosurgery, Medicana International Istanbul, Istanbul, Turkey.
| | - Duygu Dereli
- Department of Neurosurgery, Health Science University Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey
| | | | - Deniz Sirinoglu
- Department of Neurosurgery, Health Science University, Okmeydani Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - Balkan Sahin
- Department of Neurosurgery, Health Science University Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey
| | - Murat Sakir Eksi
- Department of Neurosurgery, Fatih Sultan Mehmet Training and Research Hospital, Istanbul, Turkey
| | - Ahmet Murat Musluman
- Department of Neurosurgery, Health Science University, Okmeydani Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - Adem Yilmaz
- Department of Neurosurgery, Health Science University Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey
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8
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Han S, Hou B, Li Z, Feng F, Li Y, Gao J. Individualized Functional Decompression Options for Adult Chiari Malformation With Syringomyelia and A Novel Scale for Syringomyelia Resolution: A Single-Center Experience. Neurospine 2023; 20:1501-1512. [PMID: 38171316 PMCID: PMC10762401 DOI: 10.14245/ns.2346626.313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/30/2023] [Accepted: 08/01/2023] [Indexed: 01/05/2024] Open
Abstract
OBJECTIVE To compare outcomes of posterior fossa bony decompression alone (PFD) versus PFD with duraplasty (PFDD) versus PFDD with additional obex exploration (PFDDO) in patients with Chiari malformation type I (CMI) combining syringomyelia. METHODS Clinical records of adult patients who underwent decompressions from 2014 to 2022 were retrospectively analyzed. The decompression procedure was individualized based on the cerebrospinal fluid pulse in the surgical field. The Chicago Chiari Outcome Scale (CCOS) was used to assess the prognosis of the patients and a novel syringomyelia resolution scale, based on 3-dimensional volume, was introduced. The percentage change in the cervical syrinx volume was classified as follows by resolution: ≥ 70%, 30%-70%, and < 30%. RESULTS Seventy-eight individuals were enrolled, of which 22, 20, and 36 underwent PFD, PFDD, and PFDDO, respectively. The three decompression groups had no significant difference in the preoperative characteristics and postoperative prognosis. Multivariate analyses revealed that better CCOS was significantly correlated with younger age at surgery (p = 0.018), syrinx originated from lower cervical levels (p = 0.037), narrower preoperative cerebral aqueduct (p = 0.005), and better syrinx volume resolution (p = 0.004). Additionally, a better cervical syrinx volume resolution was significantly correlated with higher CCOS (p = 0.017), narrower cerebral aqueduct (p = 0.035), and better tonsillar descent resolution (p = 0.007). CONCLUSION Individualized functional decompression induced an equal effect on CCOS and syrinx volume resolution for all CMI patients with syringomyelia. Our syringomyelia resolution scale facilitates communication and prediction of CMI prognosis.
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Affiliation(s)
- Shiyuan Han
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Bo Hou
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Zhimin Li
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Feng Feng
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Yongning Li
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
- Department of International Medical Service, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Jun Gao
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
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9
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Pattisapu JV, Ackerman LL, Infinger LK, Maher CO, Quinsey C, Rocque BG, Silberstein H, Jackson EM, Jernigan S, Niazi T, Qaiser R, Raskin JS, Vachhrajani S, Bauer DF. Congress of Neurological Surgeons Systematic Review and Evidence-Based Guidelines for Patients With Chiari Malformation: Surgical Interventions. Neurosurgery 2023; 93:731-735. [PMID: 37646504 DOI: 10.1227/neu.0000000000002635] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Chiari malformation type I (CIM) diagnoses have increased in recent years. Controversy regarding the best operative management prompted a review of the literature to offer guidance on surgical interventions. OBJECTIVE To assess the literature to determine (1) whether posterior fossa decompression or posterior fossa decompression with duraplasty is more effective in preoperative symptom resolution; (2) whether there is benefit from cerebellar tonsillar resection/reduction; (3) the role of intraoperative neuromonitoring; (4) in patients with a syrinx, how long should a syrinx be observed for improvement before additional surgery is performed; and 5) what is the optimal duration of follow-up care after preoperative symptom resolution. METHODS A systematic review was performed using the National Library of Medicine/PubMed and Embase databases for studies on CIM in children and adults. The most appropriate surgical interventions, the use of neuromonitoring, and clinical improvement during follow-up were reviewed for studies published between 1946 and January 23, 2021. RESULTS A total of 80 studies met inclusion criteria. Posterior fossa decompression with or without duraplasty or cerebellar tonsil reduction all appeared to show some benefit for symptom relief and syrinx reduction. There was insufficient evidence to determine whether duraplasty or cerebellar tonsil reduction was needed for specific patient groups. There was no strong correlation between symptom relief and syringomyelia resolution. Many surgeons follow patients for 6-12 months before considering reoperation for persistent syringomyelia. No benefit or harm was seen with the use of neuromonitoring. CONCLUSION This evidence-based clinical guidelines for the treatment of CIM provide 1 Class II and 4 Class III recommendations. In patients with CIM with or without syringomyelia, treatment options include bone decompression with or without duraplasty or cerebellar tonsil reduction. Improved syrinx resolution may potentially be seen with dural patch grafting. Symptom resolution and syrinx resolution did not correlate directly. Reoperation for a persistent syrinx was potentially beneficial if the syrinx had not improved 6 to 12 months after the initial operation. The full guidelines can be seen online at https://www.cns.org/guidelines/browse-guidelines-detail/3-surgical-interventions .
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Affiliation(s)
- Jogi V Pattisapu
- Pediatric Neurosurgery, University of Central Florida College of Medicine, Orlando , Florida , USA
| | - Laurie L Ackerman
- Department of Neurological Surgery, Indiana University Health, Indianapolis , Indiana , USA
| | - Libby Kosnik Infinger
- Department of Neurosurgery, Medical University of South Carolina (MUSC), Charleston , South Carolina , USA
| | - Cormac O Maher
- Department of Neurosurgery, Stanford Medicine, Palo Alto , California , USA
| | - Carolyn Quinsey
- Department of Neurosurgery, University of North Carolina Chapel Hill, Chapel Hill , North Carolina , USA
| | - Brandon G Rocque
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Alabama at Birmingham, Birmingham , Alabama , USA
| | - Howard Silberstein
- Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester , New York , USA
| | - Eric M Jackson
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore , Maryland , USA
| | - Sarah Jernigan
- Carolina Neurosurgery & Spine Associates, Charlotte , North Carolina , USA
| | - Toba Niazi
- Department of Neurological Surgery, Nicklaus Children's Hospital, Miami , Florida , USA
| | - Rabia Qaiser
- Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis , Indiana , USA
| | - Jeffrey S Raskin
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago , Illinois , USA
| | - Shobhan Vachhrajani
- Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton , Ohio , USA
| | - David F Bauer
- Department of Neurosurgery, Baylor College of Medicine, Houston , Texas , USA
- Division of Pediatric Neurosurgery, Texas Children's Hospital, Houston , Texas , USA
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10
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Tavallaii A, Keykhosravi E, Ghorbanpour A, Shahriari A, Rezaee H. Clinical and Radiological Outcomes of Dura-Splitting versus Duraplasty Techniques in Pediatric Chiari I Malformation: A Systematic Review and Meta-Analysis. Asian J Neurosurg 2023; 18:423-436. [PMID: 38152517 PMCID: PMC10749852 DOI: 10.1055/s-0043-1764324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023] Open
Abstract
Type I Chiari malformation is a developmental anomaly with various proposed surgical techniques for its management. The dura-splitting technique is a less invasive approach and involves the resection of the outer layer of the dura while sparing the internal layer. While this less-known approach may minimize the complication rates, there are concerns about its efficacy and outcome. Therefore, we have performed a systematic review and meta-analysis of available data on clinical and radiological outcomes of this technique in the pediatric population and compared them to the foramen magnum decompression and duraplasty technique. We have followed the Meta-analysis Of Observational Studies in Epidemiology guidelines in this review. Based on our predefined search strategy, we performed a systematic database search. Subsequently, the article screening process was done based on defined inclusion/exclusion criteria. Following the quality assessment of included studies, two authors performed data extraction. Finally, the extracted data were summarized and presented in form of tables. Forest plots were used to demonstrate the results of the meta-analysis. A review of 8 included studies consisting of 615 patients revealed the significant advantage of the dura-splitting technique in terms of shorter operation duration and hospital stay. The recurrence rate and clinical and radiological outcomes were almost similar between the two surgical techniques. Complication rates were significantly lower in the dura-splitting technique. Dura-splitting can be an effective and safe approach for the management of pediatric Chiari I malformation. However, these results are mostly extracted from observational studies and future randomized controlled trials are recommended.
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Affiliation(s)
- Amin Tavallaii
- Department of Neurosurgery, Akbar Children Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ehsan Keykhosravi
- Department of Neurosurgery, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ahmad Ghorbanpour
- Department of Neurosurgery, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Shahriari
- Faculty of Medicine, Islamic Azad University of Mashhad, Mashhad, Iran
| | - Hamid Rezaee
- Department of Neurosurgery, Mashhad University of Medical Sciences, Mashhad, Iran
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11
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Atallah O, Wolff Fernandes F, Krauss JK. The Chiari Malformations: A Bibliometric Analysis of the 100 Most Cited Articles. World Neurosurg 2023; 175:e754-e768. [PMID: 37037368 DOI: 10.1016/j.wneu.2023.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/12/2023]
Abstract
OBJECTIVE The Chiari malformations present heterogeneous entities, raising many questions regarding their natural history, pathophysiology, treatment options, and prognosis. Bibliometric analyses have emerged as a method to assess the impact of articles in current clinical practice. METHODS The most cited articles were identified via Scopus Library by using the keywords "Chiari," "Arnold-Chiari," and "Chiari malformation." The 100 most cited articles were then assembled and analyzed in detail. RESULTS The top 100 articles yielded a mean of 155,28 citations per article, ranging from 87 to 896 citations, and from 1.63 to 38.96 per year. Years of publications ranged from 1950 to 2015. Oakes was the most cited author (n = 7), followed by Tubbs and Milhorat. The country with the highest cited articles was the United States (n = 63), followed by the United Kingdom (n = 6), Italy (n = 5), Spain (n = 5), Japan (n = 4), and Germany (n = 3). Neurosurgery is the journal with the most highly cited articles (n = 21), followed by Journal of Neurosurgery (n = 19). Most articles focused on Chiari malformation type I (n = 83). The topic discussed most often was imaging (n = 63), followed by the evaluation of treatment outcome (n = 58), clinical signs and symptoms (n = 57), and the role of surgery (n = 56). CONCLUSIONS The present bibliometric analysis provides a succinct appraisal of the most cited articles concerning Chiari malformation, allowing a deeper insight in this area and its main influential articles with their impact on current clinical practice and future research.
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Affiliation(s)
- Oday Atallah
- Department of Neurosurgery, Hannover Medical School, Hannover, Germany.
| | | | - Joachim K Krauss
- Department of Neurosurgery, Hannover Medical School, Hannover, Germany
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12
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Khalaveh F, Steiner I, Reinprecht A, Czech T, Kasprian G, Rössler K, Dorfer C. Individualized surgical treatment of Chiari 1 malformation: A single-center experience. Clin Neurol Neurosurg 2023; 230:107803. [PMID: 37245455 DOI: 10.1016/j.clineuro.2023.107803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To present our experience with an individualized surgical approach to treat Chiari malformation type 1. METHODS Based on (1) neurological symptoms, (2) the existence and extent of a syrinx and (3) the degree of the tonsillar descent we performed four types of approaches on a case-by-case basis in 81 patients: (1) foramen magnum decompression (FMD) with dura splitting (FMDds); (2) FMD with duraplasty (FMDdp); (3) FMD with duraplasty and tonsillar manipulation (FMDao); and (4) tonsillar resection/reduction (TR). Patient characteristics, Chiari Severity Index (CSI), fourth ventricular roof angle (FVRA) and Chicago Chiari Outcome Scale (CCOS) were analyzed. RESULTS CCOS was between 13 and 16 points in 8/11 (73 %) patients after FMDds, 38/45 (84 %) patients after FMDdp, and 24/24 (100 %, one patient lost to follow-up) patients after TR. We experienced an overall complication rate of 13.6 % (11/81) in this series, whereas seven of these eleven complications (64 %) occurred in the FMDao group and the complication rate increased with the invasiveness of the approach (0 % FMDds; 4 % FMDdp; 12 % TR). CONCLUSION Given the clear correlation between the extend of the approach and the complication rate the least invasive approach necessary to achieve clinical improvement should be selected. Due to the high complication rates, FMDao should not be used as a treatment option. The severity of the tonsillar descent, basilar invagination and current CM1 scores could be used to aid in the approach selection.
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Affiliation(s)
- Farjad Khalaveh
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Irene Steiner
- Center for Medical Data Science, Institute of Medical Statistics, Medical University of Vienna, Vienna, Austria
| | - Andrea Reinprecht
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Thomas Czech
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Gregor Kasprian
- Department of Radiology, Division of Neuro, and Musculoskeletal Radiology, Medical University of Vienna, Vienna, Austria
| | - Karl Rössler
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Christian Dorfer
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria.
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13
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Balasa A, Bala A, Olejnik A, Marchel A, Kunert P. Pain-depression relationship, quality of life and acceptance of illness among patients with Chiari malformation type I: A cross-sectional study. Medicine (Baltimore) 2023; 102:e33738. [PMID: 37335726 DOI: 10.1097/md.0000000000033738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/21/2023] Open
Abstract
Chiari malformation type I (CM-I) is a congenital anomaly of the hindbrain. The most common symptoms include suboccipital tussive headache, dizziness and neck pain. Recently there has been growing interest in the psychological and psychiatric aspects of functioning in patients with CM-I, which have a significant effect on treatment outcomes and quality of life (QoL). The aim of the study was to assess the severity of depressive symptoms and the QoL in patients with CM-I and to identify the main factors responsible for these phenomena. A total of 178 people participated in the study and were divided into 3 groups: patients with CM-I who had undergone surgery (n = 59); patients with CM-I who had not undergone surgery (n = 63); and healthy volunteers (n = 56). Psychological evaluation included a set of questionnaires: the Beck Depression Inventory II, the World Health Organization shortened version of the WHOQOL-100 quality of life questionnaire, the Acceptance of Illness Scale and the Beliefs about Pain Control Questionnaire. Results showed that the control group participants obtained significantly better results than both groups of CM-I patients in terms of all indicators of QoL, symptoms of depression, acceptance of illness, pain level (average and present) and perceived influence of doctors regarding coping with pain. Patients with CM-I (operated and non-operated) obtained similar results in most of the questionnaires and the QoL indices correlated significantly with the majority of the analyzed variables. Moreover, CM-I patients with higher depression scores described their pain as more severe and had a stronger belief that pain levels were not influenced by them but only by doctors, or that it could be controlled randomly; they were also less willing to accept their illness. CM-I symptoms affect the mood and QoL of patients. Psychological and psychiatric care should be the golden standard in managing this clinical group.
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Affiliation(s)
- Artur Balasa
- Department of Neurosurgery, Medical University of Warsaw, Warsaw, Poland
| | | | | | - Andrzej Marchel
- Department of Neurosurgery, Medical University of Warsaw, Warsaw, Poland
| | - Przemysław Kunert
- Department of Neurosurgery, Medical University of Warsaw, Warsaw, Poland
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14
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Perrini P, Lorenzini D, Vercelli A, Perrone A, Di Carlo DT. Post-Operative Complications after Foramen Magnum Decompression with Duraplasty Using Different Graft Materials in Adults Patients with Chiari I Malformation: A Systematic Review and Meta-Analysis. J Clin Med 2023; 12:jcm12103382. [PMID: 37240488 DOI: 10.3390/jcm12103382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/28/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Despite extensive investigations, the choice of graft material for reconstructive duraplasty after foramen magnum decompression for Chiari type I malformation (CMI) is still a topic of discussion. The authors performed a systematic review and meta-analysis of the literature examining the post-operative complications in adult patients with CMI after foramen magnum decompression and duraplasty (FMDD) using different graft materials. Our systematic review included 23 studies with a total of 1563 patients with CMI who underwent FMDD with different dural substitutes. The most common complications were pseudomeningocele (2.7%, 95% CI 1.5-3.9%, p < 0.01, I2 = 69%) and CSF leak (2%, 95% CI 1-2.9%, p < 0,01, I2 = 43%). The revision surgery rate was 3% (95% CI 1.8-4.2%, p < 0.01, I2 = 54%). A lower rate of pseudomeningocele was observed with autologous duraplasty when compared with synthetic duraplasty (0.7% [95% CI 0-1.3%] vs. 5.3% [95% CI 2.1-8.4%] p < 0.01). The rate of CSF leak and revision surgery was lower after autologous duraplasty than after non-autologous dural graft (1.8% [95% CI 0.5-3.1%] vs. 5.3% [95% CI 1.6-9%], p < 0.01 and 0.8% [95% CI 0.1-1.6%] vs. 4.9% [95% CI 2.6-7.2%] p < 0.01, respectively). Autologous duraplasty is associated with a lower rate of post-operative pseudomeningocele and reoperation. This information should be considered when planning duraplasty after foramen magnum decompression in patients with CMI.
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Affiliation(s)
- Paolo Perrini
- Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana, 56124 Pisa, Italy
- Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
| | - Daniele Lorenzini
- Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana, 56124 Pisa, Italy
| | - Alberto Vercelli
- Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana, 56124 Pisa, Italy
| | - Alessandra Perrone
- Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana, 56124 Pisa, Italy
| | - Davide Tiziano Di Carlo
- Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana, 56124 Pisa, Italy
- Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy
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15
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Talamonti G, Picano M, Fragale M, Marcati E, Meccariello G, Boeris D, Cenzato M. Reoperation in Chiari-1 Malformations. J Clin Med 2023; 12:jcm12082853. [PMID: 37109192 PMCID: PMC10142814 DOI: 10.3390/jcm12082853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/05/2023] [Accepted: 04/09/2023] [Indexed: 04/29/2023] Open
Abstract
(1) Background: The issue of unsuccessful surgery for Chiari-1 malformation (CM-1), as well as its potential causes and possible solutions, remains poorly documented and studied. (2) Methods: From a retrospective review of a personal series of 98 patients undergoing treatment for CM-1 during the past 10 years, we created two study groups. Group 1: 8 patients (8.1%) requiring additional surgeries owing to postoperative complications (7 cerebrospinal fluid leakage, 1 extradural hematoma); 7 patients (7.1%) undergoing reoperations for failed decompression during the follow-up. Group 2: During the same period, we also managed 19 patients who had previously been operated on elsewhere: 8 patients who required adequate CM-1 treatment following extradural section of the filum terminale; 11 patients requiring reoperations for failed decompression. Failed decompression was managed by adequate osteodural decompression, which was associated with tonsillectomy (6 cases), subarachnoid exploration (8 cases), graft substitution (6 cases), and occipito-cervical fixation/revision (1 case). (3) Results: There was no mortality or surgical morbidity in Group 1. However, one patient's condition worsened due to untreatable syrinx. In Group 2, there were two cases of mortality, and surgical morbidity was represented by functional limitation and pain in the patient who needed revision of the occipitocervical fixation. Twenty patients improved (58.8%), 6 remained unchanged (32.3%), 1 worsened (2.9%) and 2 died (5.9%). (4) Conclusions: The rate of complications remains high in CM-1 treatment. Unfortunately, a certain rate of treatment failure is unavoidable, but it appears that a significant number of re-operations could have been avoided using proper indications and careful technique.
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Affiliation(s)
| | - Marco Picano
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
| | - Maria Fragale
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
- La Sapienza, University of Rome, 00185 Rome, Italy
| | | | | | - Davide Boeris
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
| | - Marco Cenzato
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
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16
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Park RJ, Unnikrishnan S, Berliner J, Magnussen J, Liu S, Stoodley MA. Cerebellar Tonsillar Descent Mimicking Chiari Malformation. J Clin Med 2023; 12:jcm12082786. [PMID: 37109124 PMCID: PMC10144607 DOI: 10.3390/jcm12082786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 03/31/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Chiari I malformation has been defined as cerebellar tonsillar descent greater than 5 mm below the foramen magnum. Suboccipital decompression remains the mainstay of treatment for symptomatic patients. Other conditions sometimes have imaging features that mimic Chiari I malformation. These patients are at risk of misdiagnosis and mismanagement, including surgery that may be unnecessary or may even worsen the underlying condition. The aim of this study was to analyse a series of Chiari I malformation mimics and identify differentiating imaging features. The mimics are categorised as post-traumatic cranio-cervical junction arachnoiditis, dural band, spontaneous intracranial hypotension, idiopathic intracranial hypertension, and cysts. Better understanding of these conditions will assist with diagnosis and optimal management, including avoiding unnecessary surgery.
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Affiliation(s)
| | - Sunil Unnikrishnan
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - Joel Berliner
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - John Magnussen
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
| | - Shinuo Liu
- Statewide Neurosurgical Service, Sir Charles Gairdner and Perth Children's Hospitals, Perth, WA 6009, Australia
| | - Marcus A Stoodley
- Macquarie Medical School, Macquarie University, Sydney, NSW 2109, Australia
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17
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Labuda R, Loth D, Loth F, Allen PA. Pain and Depression Account for More Than One Half of the Neck Disability Variance Among Adult Women with Chiari I. World Neurosurg 2023; 171:e478-e485. [PMID: 36526226 DOI: 10.1016/j.wneu.2022.12.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/08/2022] [Accepted: 12/09/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVE We sought to quantify the neck-related disability in adult women with Chiari malformation type I and identify the significantly related variables. METHODS A total of 70 variables were selected from the self-report history questionnaires (12 variables; n = 474), standardized scales (15 variables; n = 474), and morphometric data (43 variables; n = 293-474) of adult women with Chiari malformation type I. The variables were tested independently to identify those with a significant relationship to the Neck Disability Index (NDI; P < 0.00071) and those that might be associated with the NDI (P < 0.05). A forward selection regression model was constructed to identify the variables contributing unique variance to the NDI. In addition, a mediation analysis was performed to determine whether depression mediated the relationship between pain and disability. RESULTS Overall, 79.5% of the patients had scored at a moderate level of disability or higher. Independent testing identified 16 significant variables, including symptom duration, tonsillar position, and measures of psychological distress. The short-form McGill pain questionnaire-2 (r = 0.69; P < 0.00001) and CES-D scale for depression (r = 0.56; P < 0.00001) exhibited the highest correlations with the NDI. The forward selection regression model produced an R2 of 0.6178. Pain and depression accounted for more than one half of the NDI variance. CONCLUSIONS We found that high levels of disability are common among adult women with Chiari malformation type I, independent of surgical status. Pain and depression were the primary factors related to this disability. Depression mediated the relationship between pain intensity and disability at a modest level (5%). Patients who had experienced symptoms for >2 years before diagnosis had had, on average, 77% higher NDI scores, highlighting the importance of a timely diagnosis.
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Affiliation(s)
| | - Dorothy Loth
- Conquer Chiari Research Center, Department of Psychology, The University of Akron, Akron, Ohio, USA
| | - Francis Loth
- Department of Mechanical and Industrial Engineering, Department of Bioengineering, Northeastern University, Boston, Massachusetts, USA
| | - Philip A Allen
- Conquer Chiari Research Center, Department of Psychology, The University of Akron, Akron, Ohio, USA
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Tochigi S, Isoshima A, Ohashi H, Kawamura D, Karagiozov K, Hatano K, Ohashi S, Nagashima H, Murayama Y, Abe T. Preoperative assessment of dominant occipital sinus in patients with Chiari malformation type I: anatomical variations and implications for preventing potentially life-threatening surgical complications. J Neurosurg 2023; 138:540-549. [PMID: 35901697 DOI: 10.3171/2022.5.jns212973] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 05/16/2022] [Indexed: 02/04/2023]
Abstract
OBJECTIVE The surgical treatment of Chiari malformation type I (CM-I) frequently involves dural incision at the posterior cranial fossa. In cases of persistent patent occipital sinus (OS), the sinus is usually obliterated and divided. However, there are some patients whose OS is prominent and requires crucial modification of the operative planning to avoid potentially life-threatening massive hemorrhage and disturbance of cerebral venous circulation. In the present study, the anatomical variations of the dominant OS in patients with CM-I were analyzed and the authors attempted to develop treatment recommendations for patients with CM-I with dominant OS. METHODS The study included 213 patients with CM-I who underwent MR venography (MRV) prior to surgical treatment. OS dominance was assessed using 2D time-of-flight MRV or 3D phase-contrast MRV. Particular attention was paid to the pattern of venous outflow channels. The characteristics of the patients with dominant OS and the surgical outcomes were retrospectively reviewed. RESULTS Dominant OS was identified in 7 patients (3.3%). The age in those with dominant OS was significantly younger than in those without (p = 0.0202). The incidence of concurrent scoliosis in the patients with dominant OS was significantly higher than in those without (p = 0.0366). All the dominant OSs were found to be of the oblique type. Unilateral oblique OS (OOS) with normal ipsilateral transverse sinus (TS) and hypoplastic contralateral TS was found in 2 patients (0.9%). The authors found 1 patient each (0.5%) who had unilateral OOS with hypoplastic ipsilateral TS and normal contralateral TS, unilateral OOS with bilateral hypoplastic TSs, and bilateral OOSs with bilateral normal TSs. Bilateral OOSs with bilateral hypoplastic TSs were found in 2 patients (0.9%). All these patients had syringomyelia. Instead of performing Y-shaped dural incision and duraplasty, surgical procedures were modified depending on the types of the OOSs to preserve their venous drainage routes. Although massive bleeding from the dominant OS during dural incision occurred in 1 patient, none suffered neurological deterioration. The syrinx volume decreased in all but 1 of the patients postoperatively. CONCLUSIONS Assessment of the venous drainage pattern using MRV is indispensable for safe surgical treatment in patients with CM-I. The surgical procedure should be modified based on the type of dominant OS to minimize the surgical risks.
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Affiliation(s)
- Satoru Tochigi
- 1Department of Neurosurgery, The Jikei University Kashiwa Hospital, Kashiwa, Chiba
| | - Akira Isoshima
- 2Department of Neurosurgery, Omori Red Cross Hospital, Tokyo
| | - Hiroki Ohashi
- 3Department of Neurosurgery, The Jikei University School of Medicine, Tokyo
| | - Daichi Kawamura
- 3Department of Neurosurgery, The Jikei University School of Medicine, Tokyo
| | | | - Keisuke Hatano
- 3Department of Neurosurgery, The Jikei University School of Medicine, Tokyo
| | - So Ohashi
- 4Department of Neurosurgery, Kawasaki Saiwai Hospital, Kawasaki, Kanagawa
| | - Hiroyasu Nagashima
- 5Department of Neurosurgery, The Jikei University Katsushika Medical Center, Tokyo; and
| | - Yuichi Murayama
- 3Department of Neurosurgery, The Jikei University School of Medicine, Tokyo
| | - Toshiaki Abe
- 3Department of Neurosurgery, The Jikei University School of Medicine, Tokyo.,6Department of Neurosurgery, Mishima Central Hospital, Mishima, Shizuoka, Japan
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Hamrick F, Eli IM, Hunsaker J, Kim RB, Karsy M, Schmidt RH. Dual Dural Patch Graft With AlloDerm and DuraGen Underlay for Duraplasty in Chiari Malformation Results in Significantly Decreased Cerebrospinal Fluid Leak Complications. Oper Neurosurg (Hagerstown) 2023; 24:162-167. [PMID: 36637300 DOI: 10.1227/ons.0000000000000483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/30/2022] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Grafts available for posterior fossa dural reconstruction after Chiari decompression surgery include synthetic, xenograft, allograft, and autograft materials. The reported rates of postoperative pseudomeningocele and cerebrospinal fluid leak vary, but so far, no dural patch material or technique has sufficiently eliminated these problems. OBJECTIVE To compare the incidence of graft-related complications after posterior fossa surgery using AlloDerm alone vs AlloDerm with a DuraGen underlay. METHODS We performed a retrospective single-center study of a cohort of 106 patients who underwent Chiari decompression surgery by a single surgeon from 2014 through 2021. Age, sex, body mass index, tonsillar descent, syrinx formation, type of dural graft, and follow-up data were analyzed using univariate and χ2 statistical tests. RESULTS The AlloDerm-only group had a percutaneous cerebrospinal fluid (CSF) leak rate of 8.6% vs a 0% rate in the dual graft group (P = .037). At initial follow-up, there was a 15.5% combined rate of pseudomeningocele formation plus CSF leak in the AlloDerm-only group vs 18.8% in the AlloDerm + DuraGen group (P = .659). However, the pseudomeningoceles were larger in the AlloDerm-only cohort (45.5 vs 22.4 mm anteroposterior plane, P = .004), and 5 patients in this group required operative repair (56%). All pseudomeningoceles resolved without reoperation in the AlloDerm + DuraGen group (P = .003). CONCLUSION The use of a DuraGen underlay with a sutured AlloDerm dural patch resulted in significantly fewer CSF-related complications and eliminated the need for reoperation compared with AlloDerm alone. This single-center study provides evidence that buttressing posterior fossa dural grafts with a DuraGen underlay may decrease the risk of postoperative complications.
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Affiliation(s)
- Forrest Hamrick
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, Utah, USA
| | - Ilyas M Eli
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, Utah, USA
| | - Joshua Hunsaker
- School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Robert B Kim
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, Utah, USA
| | - Michael Karsy
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, Utah, USA
| | - Richard H Schmidt
- Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, Utah, USA
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20
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Zhang M, Hu Y, Song D, Duan C, Wei M, Zhang L, Lei S, Guo F. Exploring the prognostic differences in patients of Chiari malformation type I with syringomyelia undergoing different surgical methods. Front Neurol 2023; 13:1062239. [PMID: 36686516 PMCID: PMC9846178 DOI: 10.3389/fneur.2022.1062239] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/12/2022] [Indexed: 01/05/2023] Open
Abstract
Background The best surgical treatment of Chiari malformation patients with syringomyelia remains controversial, and whether cerebellar tonsillectomy should be performed has not been decided. Objective To evaluate the efficacy of posterior fossa decompression with duraplasty (PFDD) and Posterior fossa decompression with resection of tonsils (PFDRT) in patients of Chiari malformation type I (CM-I) with syringomyelia and explore relevant factors affecting prognosis. Patients and methods We retrospectively analyzed 182 adult patients of CM-I with syringomyelia who underwent PFDD or PFDRT over a 6-year period, and analyzed their clinical manifestations, imaging features, and follow-up data. Clinical outcomes were assessed using the Chicago Chiari Outcome Scale (CCOS), and imaging outcomes were assessed using the syrinx remission rate. Difference comparisons were performed to compare the differences between different surgical groups. Influencing factors associated with outcome were investigated using bivariate analysis and multiple linear regression analysis. Results There were statistically significant differences in CCOS score (p = 0.034) and syrinx remission rates (p = 0.046) between the PFDRT group and the PFDD group after surgery. Regression analysis showed that preoperative motor dysfunction, cerebellar-related symptoms and different surgical methods may have influenced the CCOS score and that brainstem-related symptoms and age may have influenced the syrinx remission rates in the total patient group (p < 0.05). Regression analysis showed that the duration of symptoms, cerebellar-related symptoms and preoperative syrinx diameter may have influenced the CCOS score and that the preoperative cerebellar tonsillar hernia distance may have influenced the postoperative syrinx remission rate in the PFDRT group (p < 0.05). Age and length of hospital stay may have influenced the CCOS score, and brainstem-related symptoms and age may have influenced the syrinx remission rates in the PFDD group (p < 0.05). Conclusion This study showed that the CCOS score in the PFDRT group was better than that in the PFDD group. Preoperative motor dysfunction, cerebellar-related symptoms, and different surgical methods in patients of CM-I with syringomyelia affected postoperative CCOS score. Both the duration of symptoms and the age of the patients should be actively considered as factors influencing prognosis. Symptomatic CM-I patients with syringomyelia should undergo surgical treatment as early as possible.
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Affiliation(s)
- Mingchu Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China
| | - Yan Hu
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China
| | - Dengpan Song
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China
| | - Chengcheng Duan
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China
| | - Mingkun Wei
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China
| | - Longxiao Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China
| | - Shixiong Lei
- Department of Neurosurgery, Beijing Hospital, Beijing, China
| | - Fuyou Guo
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China,International Joint Laboratory of Chiari Malformation, Zhengzhou, Henan, China,*Correspondence: Fuyou Guo ✉
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Zisakis A, Sun R, Pepper J, Tsermoulas G. Chiari Malformation Type 1 in Adults. Adv Tech Stand Neurosurg 2023; 46:149-173. [PMID: 37318574 DOI: 10.1007/978-3-031-28202-7_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The term Chiari malformation refers to a heterogeneous group of anatomical abnormalities at the craniovertebral junction. Chiari malformation type 1 (CM1) refers to the abnormal protrusion of cerebellar tonsils through the foramen magnum and is by far the commonest type. Its prevalence is estimated approximately 1%; it is more common in women and is associated with syringomyelia in 25-70% of cases. The prevalent pathophysiological theory proposes a morphological mismatch between a small posterior cranial fossa and a normally developed hindbrain that results in ectopia of the tonsils.In most people, CM1 is asymptomatic and diagnosed incidentally. In symptomatic cases, headache is the cardinal symptom. The typical headache is induced by Valsalva-like maneuvers. Many of the other symptoms are nonspecific, and in the absence of syringomyelia, the natural history is benign. Syringomyelia manifests with spinal cord dysfunction of varying severity. The approach to patients with CM1 should be multidisciplinary, and the first step in the management is phenotyping the symptoms, because they may be due to other pathologies, like a primary headache syndrome. Magnetic resonance imaging, which shows cerebellar tonsillar decent 5 mm or more below the foramen magnum, is the gold standard investigative modality. The diagnostic workup may include dynamic imaging of the craniocervical junction and intracranial pressure monitoring.The management of CM1 is variable and sometimes controversial. Surgery is usually reserved for patients with disabling headaches or neurological deficits from the syrinx. Surgical decompression of the craniocervical junction is the most widely used procedure. Several surgical techniques have been proposed, but there is no consensus on the best treatment strategy, mainly due to lack of high-quality evidence. The management of the condition during pregnancy, restriction to lifestyle related to athletic activities, and the coexistence of hypermobility require special considerations.
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Affiliation(s)
- Athanasios Zisakis
- Department of Neurosurgery, Queen Elizabeth Hospital Birmingham, University Hospitals of Birmingham, Birmingham, UK
| | - Rosa Sun
- Department of Neurosurgery, Queen Elizabeth Hospital Birmingham, University Hospitals of Birmingham, Birmingham, UK
| | - Joshua Pepper
- Department of Neurosurgery, Queen Elizabeth Hospital Birmingham, University Hospitals of Birmingham, Birmingham, UK
| | - Georgios Tsermoulas
- Department of Neurosurgery, Queen Elizabeth Hospital Birmingham, University Hospitals of Birmingham, Birmingham, UK.
- Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK.
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22
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Assessing Clinical Outcome Measures in Chiari I Malformation. Neurosurg Clin N Am 2023; 34:167-174. [DOI: 10.1016/j.nec.2022.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Yang M, Niu HT, Jiang HS, Wang YZ. Posterior fossa decompression and duraplasty with and without tonsillar resection for the treatment of adult Chiari malformation type I and syringomyelia. Medicine (Baltimore) 2022; 101:e31394. [PMID: 36550873 PMCID: PMC9771352 DOI: 10.1097/md.0000000000031394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The current surgical management of adult Chiari malformation type I (CM-I) with associated syringomyelia remains controversial. The objective of this study was to explore posterior fossa decompression and duraplasty (PFDD) with and without tonsillar resection in adult patients with CM-I and syringomyelia. METHODS A total of 116 adult patients suffering from both CM-I and syringomyelia who were scheduled to undergo surgical decompression at our institution between 2012 and 2020 were randomly divided into 2 groups: the PFDD group (n = 64) underwent PFDD without tonsillar resection, while the PFDD-T group (n = 52) underwent PFDD with tonsillar resection. The primary outcome was improvement or resolution of the syrinx. The secondary outcome was an improvement in clinical outcome based on Chicago Chiari Outcome Scale (CCOS) scores. All participants were followed-up to 1-year postoperatively. RESULTS The proportions of patients who had >20% improvement in syrinx size were 60.9% and 78.8% in the PFDD and PFDD-T groups, respectively (P = .038). The improvement in clinical outcome based on CCOS scores was significantly different in the 2 groups (P = .004). The functionality sub-score was significantly different between the 2 groups (P = .027), but there were no significant differences in the pain symptoms, non-pain symptoms, and complications sub-scores. The total CCOS scores were higher in the PFDD-T group than in the PFDD group (P = .037). CONCLUSION This study determined the role of tonsillar resection in achieving obvious syrinx improvement following PFDD-T. PFDD with tonsillar resection seems to be a safe and effective surgical option to treat adult CM-I patients with syringomyelia.
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Affiliation(s)
- Ming Yang
- Fourth Neurosurgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, PR China
- * Correspondence: Ming Yang, Fourth Neurosurgery Department, Cangzhou Central Hospital, No.16 Xinhua West Road, Cangzhou, Hebei Province 061017, PR China (e-mail: )
| | - Hai-Tao Niu
- Fourth Neurosurgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, PR China
| | - Hong-Sheng Jiang
- Fourth Neurosurgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, PR China
| | - Yan-Zhou Wang
- Fourth Neurosurgery Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, PR China
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Lu C, Ma L, Guan J, Liu Z, Wang K, Duan W, Chen Z, Wu H, Jian F. Relationship Between Syrinx Resolution and Cervical Sagittal Realignment Following Decompression Surgery for Chiari I Malformation Related Syringomyelia Based on Configuration Phenotypes. Neurospine 2022; 19:1057-1070. [PMID: 36597642 PMCID: PMC9816586 DOI: 10.14245/ns.2244530.265] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Accepted: 08/26/2022] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE Combined with different configuration types of syringomyelia, to analyze the correlation between syrinx resolution and changes in cervical sagittal alignment following Foramen magnum and Magendie dredging (FMMD) for syringomyelia associated with Chiari I malformation (CM-I), and to further explore the respective relationship with clinical outcome. METHODS A consecutive series of 127 patients with CM-I and syringomyelia who underwent FMMD in our center met the inclusion criteria of this study. Their clinical records and radiologic data were retrospectively reviewed. The Japanese Orthopedic Association (JOA) scoring system and the Chicago Chiari Outcome Scale (CCOS) were used to evaluate the surgical efficacy. The phenotypes of syringomyelia and the clinical characteristics of the patients were analyzed according to grouping by cervical curvature at baseline. RESULTS The preoperative straight or kyphotic cervical alignment is more common in the moniliform syrinx. After surgery, the syrinx resolution and cervical sagittal realignment in the moniliform group are more obvious, and the corresponding prognosis is relatively better. Spearman correlation analysis showed that the ΔS/C ratio (the change ratio of syrinx/cord) was positively correlated with the CCOS (p = 0.001, r = 0.897) and ΔC2-7A (the change of lower cervical angle) (p = 0.002, r = 0.560). There was also a correlation between the ΔJOA score (the change rate of the JOA score) and ΔC2-7A (p = 0.012, r = 0.467). CONCLUSION After decompression surgery, syrinx resolution may coexist with the changes in the subaxial lordosis angle, especially for syrinx in moniliform type, and the relationship between syrinx resolution and cervical sagittal realignment might be valuable for evaluating the surgical outcome.
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Affiliation(s)
- Chunli Lu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Longbing Ma
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Jian Guan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Zhenlei Liu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Kai Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Wanru Duan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Zan Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Hao Wu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China
| | - Fengzeng Jian
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China,National Center for Neurological Disorders, Beijing, China,Corresponding Author Fengzeng Jian China International Neuroscience Institute (CHINA-INI), Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing 100053, China
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Hemorrhage due to a pseudoaneurysm on a dural-pial anastomosis after decompression for Chiari malformation type I: case report. Acta Neurochir (Wien) 2022; 164:3215-3219. [PMID: 36063230 DOI: 10.1007/s00701-022-05341-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 08/05/2022] [Indexed: 02/01/2023]
Abstract
While intracranial aneurysms rarely develop after neurosurgical procedures, delayed pseudoaneurysm formation after foramen magnum decompression (FMD) has never been reported. A 52-year-old woman presented with an atypical subarachnoid hemorrhage in the posterior fossa 12 years after a FMD for symptomatic Chiari malformation type I was performed. A pseudoaneurysm on a dural-pial anastomosis was identified as the bleeding source and successfully occluded by endovascular means with full clinical recovery of the patient. Injury to the distal posterior inferior cerebellar artery related to surgery and postoperative infection likely caused formation of a dural-pial anastomosis. Additionally, hemodynamic stress or dissection may have contributed to delayed pseudoaneurysm formation and rupture.
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Gilna GP, Clarke JE, Silva M, Saberi RA, Parreco JP, Thorson CM, McCrea HJ. Assessment of neuromonitoring use and postoperative readmission rates in pediatric Chiari I malformation with syrinx. Childs Nerv Syst 2022; 39:1021-1027. [PMID: 36411360 DOI: 10.1007/s00381-022-05746-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 11/03/2022] [Indexed: 11/23/2022]
Abstract
INTRODUCTION While operative intervention for Chiari malformation type I (CMI) with syringomyelia is well established, there is limited data on outcomes of intraoperative neuromonitoring (IONM). This study sought to explore differences in procedural characteristics and their effects on postoperative readmission rates. METHODS The Nationwide Readmission Database was queried from 2010 to 2014 for patients ≤ 18 years of age with CMI and syringomyelia who underwent cranial decompression or spinal decompression. Demographics, hospital characteristics, and outcomes were analyzed. RESULTS Over the 5-year period, 2789 patients were identified that underwent operative treatment for CMI with syringomyelia. Mean age was 10 ± 4 years with 55% female. During their index hospitalization 14% of the patients had IONM. Patients receiving IONM had no significant difference in Charleston Comorbidity Index ≥ 1 (16% vs. 15% without, p = 0.774). IONM was more often used in those with private insurance (63% vs. 58% without, p = 0.0004) and less likely in those with Medicaid (29% vs. 37% without, p = 0.004). Patients receiving IONM were more likely to have a postoperative complication (23% vs 17%, p = 0.004) and were more likely to have hospital lengths of stay > 7 days (9% vs. 5% without, p = 0.005). Readmission rates for CMI were 9% within 30 days and 15% within the year. The majority (89%) of readmissions were unplanned. 25% of readmissions were for infection and 27% of readmissions underwent a CMI reoperation. The 30-day readmission rate was higher for those with IONM (12% vs. 8% without, p = 0.010). Median cost for hospitalization was significantly higher for patients with IONM ($26,663 ($16,933-34,397)) vs. those without ($14,577 ($11,538-18,392)), p < 0.001. CONCLUSION The use of intraoperative neuromonitoring for operative repair of CMI is associated with higher postoperative complications and readmissions. In addition, there are disparities in its use and increased cost to the healthcare system. Further studies are needed to elucidate the factors underlying this association.
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Affiliation(s)
- Gareth P Gilna
- DeWitt-Daughtry Family Department of Surgery, Division of Pediatric Surgery, University of Miami Miller School of Medicine, FL, Miami, USA
| | - Jamie E Clarke
- Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Michael Silva
- Department of Neurological Surgery, University of Miami Miller School of Medicine/Jackson Memorial Health System, FL, Miami, USA
| | - Rebecca A Saberi
- DeWitt-Daughtry Family Department of Surgery, Division of Pediatric Surgery, University of Miami Miller School of Medicine, FL, Miami, USA
| | - Joshua P Parreco
- Department of Surgery, Memorial Healthcare System, Hollywood, FL, USA
| | - Chad M Thorson
- DeWitt-Daughtry Family Department of Surgery, Division of Pediatric Surgery, University of Miami Miller School of Medicine, FL, Miami, USA
| | - Heather J McCrea
- Department of Neurological Surgery, University of Miami Miller School of Medicine/Jackson Memorial Health System, FL, Miami, USA.
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A Clinical Study on the Treatment of Recurrent Chiari (Type I) Malformation with Syringomyelia Based on the Dynamics of Cerebrospinal Fluid. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9770323. [DOI: 10.1155/2022/9770323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022]
Abstract
Objective. Combining the dynamics of cerebrospinal fluid, our study investigates the clinical effects of syringomyelia after the combination of fourth ventricle-subarachnoid shunt (FVSS) for recurrent Chiari (type I) malformations after cranial fossa decompression (foramen magnum decompression (FMD)). Methods. From December 2018 to December 2020, 15 patients with recurrent syringomyelia following posterior fossa decompression had FVSS surgery. Before and after the procedure, the clinical and imaging data of these individuals were retrospectively examined. Results. Following FVSS, none of the 15 patients experienced infection, nerve injury, shunt loss, or obstruction. 13 patients improved dramatically after surgery, while 2 patients improved significantly in the early postoperative period, but the primary symptoms returned 2 months later. The Japanese Orthopedic Association (JOA) score was
, which was considerably better than preoperatively (
,
0.001). The MRI results revealed that the cavities in 13 patients were reduced by at least 50% compared to the cavities measured preoperatively. The shrinkage rate of syringomyelia was 86.67% (13/15). One patient’s cavities nearly vanished following syringomyelia. The size of the cavity in the patient remain unchanged, and the cavity’s maximal diameter was significantly smaller than the size measured preoperatively (
) PC-MRI results indicated that the peak flow rate of cerebrospinal fluid at the central segment of the midbrain aqueduct and the foramen magnum in patients during systole and diastole were significantly reduced after surgery (
). Conclusion. After posterior fossa decompression, FVSS can effectively restore the smooth circulation of cerebrospinal fluid and alleviate clinical symptoms in patients with recurrent Chiari (type I) malformation and syringomyelia. It is a highly effective way of treatment.
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Yuan C, Guan J, Du Y, Fang Z, Wang X, Yao Q, Zhang C, Liu Z, Wang K, Duan W, Wang X, Wang Z, Wu H, Jian F. Neurological deterioration after posterior fossa decompression for adult syringomyelia: Proposal for a summarized treatment algorithm. Front Surg 2022; 9:968906. [PMID: 36189393 PMCID: PMC9520238 DOI: 10.3389/fsurg.2022.968906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/29/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundPatients with syringomyelia who present with new neurological symptoms after posterior fossa decompression (PFD) are not uncommon. However, systematic reports on different pathologies are few in the literature.ObjectiveThe purpose of this study was to summarize our experience for failed PFD.MethodsBetween January 2015 and December 2019, 85 consecutive failed PFD patients were identified. The neurological courses were summarized with Klekamp J (KJ) or mJOA score system for all patients. Long-term results were summarized with Kaplan-Meier method.ResultsTwenty-eight consecutive patients underwent FMDD (Foramen magnum and foramen of Magendie dredging) (Group I), extradural PFD and manipulation of tonsil was significantly associated with lower failure rates. Twenty patients underwent craniocervical fixation (Group II), nine underwent local spinal segment decompression (Group III), six underwent CSF diversion procedures, and one were treated for persistent pain by radiofrequency. Neuropathic pain was most significantly improved in Group I while swallowing improved in Group II within 1 year after the surgery. In the long term, late postoperative deterioration-free possibility in Group II was better than in Group I. All patients in Group III improved (P = 0.0088). Six cases of CSF diversion procedures were relieved in a short time. Pain in one patient persisted after PFD, and trial of radiofrequency failed.ConclusionNot only does the recurrent cerebrospinal fluid flow obstruct the foramen magnum, but also spinal pathologies and craniocervical instabilities may occur. This study provides the largest summarized clinical experience that may assist surgeons with different therapeutic decisions for failed PFD.
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Affiliation(s)
- Chenghua Yuan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Jian Guan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Yueqi Du
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zeyu Fang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Xinyu Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Qingyu Yao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Can Zhang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zhenlei Liu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Kai Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Wanru Duan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Xingwen Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zuowei Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Hao Wu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Fengzeng Jian
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China,
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China,
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- Correspondence: Fengzeng Jian
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Capel C, Padovani P, Launois PH, Metanbou S, Balédent O, Peltier J. Insights on the Hydrodynamics of Chiari Malformation. J Clin Med 2022; 11:jcm11185343. [PMID: 36142990 PMCID: PMC9501326 DOI: 10.3390/jcm11185343] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/30/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Background: We propose that the appearance of a ptosis of the cerebellar tonsils and syringomyelia is linked to its own hemohydrodynamic mechanisms. We aimed to quantify cerebrospinal fluid (CSF) and cerebral blood flow to highlight how neurofluid is affected by Chiari malformations type 1(CMI) and its surgery. Methods: We retrospectively included 21 adult patients with CMI who underwent pre- and postoperative phase contrast MRI (PCMRI) during the period from 2001 to 2017. We analyzed intraventricular CSF, subarachnoid spaces CSF, blood, and tonsils pulsatilities. Results: In preoperative period, jugular venous drainage seems to be less preponderant in patients with syringomyelia than other patients (venous correction factor: 1.49 ± 0.4 vs. 1.19 ± 0.1, p = 0.05). After surgery, tonsils pulsatility decreased significantly (323 ± 175 μL/cardiac cycle (CC) vs. 194 ± 130 μL/CC, p = 0.008) and subarachnoid CSF pulsatility at the foramen magnum increased significantly (201 ± 124 μL/CC vs. 363 ± 231 μL/CC, p = 0.02). After surgery, we found a decrease in venous flow amplitude (5578 ± 2469 mm3/s vs. 4576 ± 2084 mm3/s, p = 0.008) and venous correction factor (1.98 ± 0.3 vs. 1.20 ± 0.3 mm3/s, p = 0.004). Conclusions: Phase-contrast MRI could be a useful additional tool for postoperative evaluation and follow-up, and is complementary to morphological imaging.
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Affiliation(s)
- Cyrille Capel
- Department of Neurosurgery, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
- Chimère UR 7516, Jules Verne University, 80000 Amiens, France
- Correspondence:
| | - Pauline Padovani
- Department of Neurosurgery, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
| | - Pierre-Henri Launois
- Department of Neurosurgery, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
| | - Serge Metanbou
- Radiology Department, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
| | - Olivier Balédent
- Chimère UR 7516, Jules Verne University, 80000 Amiens, France
- Radiology Department, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
- Image Processing Department, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
| | - Johann Peltier
- Department of Neurosurgery, Hospital University Center of Amiens-Picardie, 80054 Amiens, France
- Chimère UR 7516, Jules Verne University, 80000 Amiens, France
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Yuan C, Guan J, Du Y, Fang Z, Wang X, Yao Q, Zhang C, Jia S, Liu Z, Wang K, Duan W, Wang X, Wang Z, Wu H, Chen Z, Jian F. Spinal Obstruction-Related vs. Craniocervical Junction-Related Syringomyelia: A Comparative Study. Front Neurol 2022; 13:900441. [PMID: 35979061 PMCID: PMC9376629 DOI: 10.3389/fneur.2022.900441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 06/23/2022] [Indexed: 01/08/2023] Open
Abstract
Background No prior reports have focused on spinal cord injury (SCI) characteristics or inflammation after destruction of the blood–spinal cord barrier by syringomyelia. This study aimed to determine the differences in syringomyelia-related central SCI between craniocervical junction (CCJ) syringomyelia and post-traumatic syringomyelia (PTS) before and after decompression. Methods In all, 106 CCJ, 26 CCJ revision and 15 PTS patients (mean history of symptoms, 71.5 ± 94.3, 88.9 ± 85.5, and 32.3 ± 48.9 months) between 2015 and 2019 were included. The symptom course was analyzed with the American Spinal Injury Association ASIA and Klekamp–Samii scoring systems, and neurological changes were analyzed by the Kaplan–Meier statistics. The mean follow-up was 20.7 ± 6.2, 21.7 ± 8.8, and 34.8 ± 19.4 months. Results The interval after injury was longer in the PTS group, but the natural history of syringomyelia was shorter (p = 0.0004 and 0.0173, respectively). The initial symptom was usually paraesthesia (p = 0.258), and the other main symptoms were hypoesthesia (p = 0.006) and abnormal muscle strength (p = 0.004), gait (p < 0.0001), and urination (p < 0.0001). SCI associated with PTS was more severe than that associated with the CCJ (p = 0.003). The cavities in the PTS group were primarily located at the thoracolumbar level, while those in the CCJ group were located at the cervical-thoracic segment at the CCJ. The syrinx/cord ratio of the PTS group was more than 75% (p = 0.009), and the intradural adhesions tended to be more severe (p < 0.0001). However, there were no significant differences in long-term clinical efficacy or peripheral blood inflammation markers (PBIMs) except for the red blood cell (RBC) count (p = 0.042). Conclusion PTS tends to progress faster than CCJ-related syringomyelia. Except for the RBC count, PBIMs showed no value in distinguishing the two forms of syringomyelia. The predictive value of the neutrophil-to-lymphocyte ratio for syringomyelia-related inflammation was negative except in the acute phase.
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Affiliation(s)
- Chenghua Yuan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Jian Guan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Yueqi Du
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zeyu Fang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Xinyu Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Qingyu Yao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Can Zhang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Shanhang Jia
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zhenlei Liu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Kai Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Wanru Duan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Xingwen Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zuowei Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Hao Wu
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zan Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Fengzeng Jian
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Laboratory of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- National Center for Neurological Disorders, Beijing, China
- *Correspondence: Fengzeng Jian
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Ebrahimzadeh SA, Du E, Chang YM, Bouffard M, Loth F, Bhadelia RA. MRI findings differentiating tonsillar herniation caused by idiopathic intracranial hypertension from Chiari I malformation. Neuroradiology 2022; 64:2307-2314. [PMID: 35697809 DOI: 10.1007/s00234-022-02993-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/02/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE Some patients with idiopathic intracranial hypertension (IIH) have cerebellar tonsillar herniation ≥ 5 mm mimicking Chiari malformation I (CMI), which can result in misdiagnosis and unjustified treatment. Our purpose was to identify IIH patients with tonsillar herniation ≥ 5 mm (IIHTH) and compare with CMI patients to assess imaging findings that could distinguish the two conditions. METHODS Ninety-eight patients with IIH, 81 patients with CMI, and 99 controls were retrospectively assessed. Two neuroradiologists blindly reviewed MR images. IIHTH patients were compared with CMI patients and controls regarding the extent of tonsillar herniation (ETH), bilateral transverse sinus stenosis (BTSS), hypophysis-sella ratio (HSR), and bilateral tortuosity of optic nerve (BTON). RESULTS 13/98 (13.2%) IIH patients had tonsillar herniation ≥ 5 mm (IIHTH) and were significantly younger and had higher BMI compared with CMI patients and controls. ETH was significantly less in the IIHTH than CMI (6.5 ± 2.4 mm vs. 10.9 ± 4.4 mm; p < 0.001). BTSS and HSR < 0.5 were more common in IIHTH than CMI (p < 0.001 and p = 0.003, respectively). No differences were seen between CMI and controls. BTON was significantly more common in IIHTH compared to control (p = 0.01) but not to the CMI (p = 0.36). Sensitivity and specificity to differentiate IIHTH from CMI were 69.2% and 96.1% for BTSS and 69.2% and 75.3% for HSR < 0.5. CONCLUSION The presence of BTSS and/or HSR < 0.5 in patients with ETH ≥ 5 mm should suggest further evaluation to exclude IIH before considering CMI surgery.
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Affiliation(s)
- Seyed Amir Ebrahimzadeh
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA.
| | - Elizabeth Du
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA
| | - Yu-Ming Chang
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA
| | - Marc Bouffard
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Francis Loth
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA
| | - Rafeeque A Bhadelia
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA
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Surgical Management after Chiari Decompression Failure: Craniovertebral Junction Revision versus Shunting Strategies. J Clin Med 2022; 11:jcm11123334. [PMID: 35743405 PMCID: PMC9224814 DOI: 10.3390/jcm11123334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/20/2022] [Accepted: 06/02/2022] [Indexed: 11/16/2022] Open
Abstract
Revision surgery after posterior fossa decompression for Chiari malformation is not uncommon and poses both strategic and technical challenges. We conducted a single-center retrospective cohort study including all adult patients who underwent revision surgery after posterior fossa decompression for Chiari type I malformation between 2010 and 2019. Among 311 consecutive patients operated on for Chiari malformation at our institution, 35 patients had a least one revision surgery with a mean follow-up of 70.2 months. Mean delay for revision was 28.8 months. First revision surgery was performed at the level of the foramen magnum in 25/35 cases and consisted in duraplasty revision in all cases, arachnolysis (51.4%), additional bone decompression (37.1%), tonsillar coagulation or resection (25.7%), 4th ventricle to cervical subarachnoid spaces shunt (5.7%). Most repeat revisions consisted in CSF diversion procedures, with either ventriculo-peritoneal or syringo-peritoneal shunts. Mean number of interventions per patient was 3.2, with 22.9% of patients undergoing 4 or more surgeries. Based on our experience, we propose that revision at the level of the foramen magnum should be considered as a first-line strategy for Chiari decompression failure. Shunting procedures can be performed in case of extensive arachnoiditis or repeated failures.
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Zhou Q, Song C, Huang Q, Li H, Yang X, Peng L, Li J, Chen L, Shi L, Qi S, Lu Y. Evaluating craniovertebral stability in Chiari malformation coexisting with Type II basilar invagination: an observational study based on kinematic computed tomography and its clinical application. World Neurosurg 2022; 164:e724-e740. [PMID: 35595047 DOI: 10.1016/j.wneu.2022.05.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/10/2022] [Accepted: 05/10/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND Treatment of Chiari malformation (CM) is controversial, especially when it coexists with "stable" or Type II basilar invagination (CM+II-BI). Precise evaluation of craniovertebral junction (CVJ) stability is crucial in such patients; however, this has never been validated. This study aimed to dynamically evaluate atlanto-condyle and atlantoaxial stability by kinematic computed tomography (CT) and report its surgical treatment. METHODS The study recruited 101 patients (control, CM, and CM+II-BI groups: 48, 34, and 19 patients, respectively). During kinematic CT, the CVJ stability-related parameters were measured and compared between the three groups. The surgical strategy for treating CM+II-BI was based on these results. Pre- and postoperative images were acquired, and functional scores were used to assess the outcome. RESULTS Among the three groups, the length of the clivus and the height of the condyle were the shortest in the CM+II-BI group, which was accompanied by the greatest rotation of the atlas and atlanto-condyle facet movement on cervical flexion and extension. Moreover, in such patients, increased Chamberlain's baseline violation indicated the aggregate invagination of the odontoid in the flexed position, and asymmetric displacement of atlantoaxial facets was observed. Seventeen CM+II-BI patients underwent surgical treatment with atlantoaxial distraction and occipitocervical fusion. The syringomyelia width and tonsillar herniation decreased significantly, and functional scores indicated symptom relief and good outcomes. CONCLUSIONS CVJ instability, especially the ultra-movement of atlanto-condyle facets, commonly exists in II-BI as evaluated using kinematic CT. The surgical strategy of atlantoaxial distraction and occipitocervical fusion should be considered to treat such patients.
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Affiliation(s)
- Qiang Zhou
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Chong Song
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Qinguo Huang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Hong Li
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoyu Yang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Lin Peng
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Junjie Li
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Lei Chen
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Linyong Shi
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Songtao Qi
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Glioma Center, Guangzhou, China
| | - Yuntao Lu
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Neurology Research Institution, Nanfang Hospital, Southern Medical University, Guangzhou, China; Nanfang Glioma Center, Guangzhou, China.
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Hu Z, Liao G, Lu Y, Wang C, Mei J. Comparison of Dural Graft Types and Graft Fixation Methods in Chiari Malformation Type I Decompression Surgery. World Neurosurg 2022; 164:e458-e462. [PMID: 35526814 DOI: 10.1016/j.wneu.2022.04.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Suboccipital decompression with duraplasty is being increasingly accepted for treating patients with Chiari malformation type I (CM-1). To date, the optimal duraplasty for CM-I has not been delineated. This study aims to compare the clinical and radiologic effects of duraplasty performed using 2 types of grafts and 2 graft fixation methods in 3 combinations. METHODS In this retrospective study, 84 consecutive decompressions with duraplasty were analyzed. Two types of grafts (nonautologous [Non-Auto G], 90.5% and autologous [Auto G], 9.5%) and 2 graft fixations (suturing [S], 31.0%; and suturing plus gluing [S + G], 69.0%) were used in 3 different combinations: Non-Auto G S: 31.0%; Non-Auto G S + G: 59.5%, and Auto G S + G: 9.5%. All patients were followed up for 3 months. Clinical results were evaluated using the Gestalt scale, and syringomyelia results were evaluated using magnetic resonance imaging. RESULTS According to the Gestalt scale, 82.1% of the patients showed improvement 3 months post operation, and the improvement was not related to the type of graft (P = 0.90), fixation (P = 0.90), or duraplasty (P = 0.81). Decreased syringomyelia was observed in 76.4% of the patients. It was not associated with the graft (P = 0.53), fixation (P = 0.72), or duraplasty (P = 0.80). Meningitis occurred in the Auto G S + G, Non-Auto G S + G and Non-Auto G S groups (25%, 48%, and 23.1%, respectively; P = 0.30), and their formations were not related to the k graft type (P = 0.57) or fixation (P = 0.19). CONCLUSIONS Autologous and nonautologous dural grafts can be performed using either sutures or sutures plus glue, as both result in similar outcomes.
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Affiliation(s)
- Zuli Hu
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Gang Liao
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yuzhao Lu
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Chunliang Wang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China.
| | - Jinhong Mei
- Department of Pathology, The First Affiliated Hospital of Nanchang University, Nanchang, China; Institute of Molecular Pathology, Nanchang University, Nanchang, China
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Sangwanloy P, Vaniyapong T, Norasetthada T, Jetjumnong C. Influence of clivo-axial angle on outcome after foramen magnum decompression in adult symptomatic Chiari type 1 malformation. Clin Neurol Neurosurg 2022; 216:107214. [PMID: 35339104 DOI: 10.1016/j.clineuro.2022.107214] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/05/2022] [Accepted: 03/16/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVE A significant number of patients with Chiari type 1 malformation (CM1) have abnormal clivo-axial angle (CXA) without other radiographic indicators of basilar invagination or craniovertebral junction (CVJ) instability. This study aimed to investigate whether abnormal CXA alone influences postoperative outcomes among patients who underwent foramen magnum decompression (FMD). METHODS A total of 44 adult patients with symptomatic CM1 undergoing FMD without CVJ fixation were enrolled. Preoperative clinical characteristics and radiographic measurement include the CXA as well as the radiographic indicators of basilar invagination and instability were recorded. The univariate and multivariate binary logistic regression tests were used to identify the potential prognostic factors for favorable outcomes. RESULTS Eighteen patients (41%) and 26 patients (59%) were divided into unfavorable and favorable outcome groups, respectively. Baseline demographic and imaging characteristics were similar between the two patient groups. The mean CXA was 132.3 ± 15.8 and 145 ± 13.6 degrees in the unfavorable and favorable groups, respectively (P = 0.091). In the favorable outcome group, the proportion of patients with CXA > 135 degrees was significantly higher than that of the unfavorable outcome group (77% vs. 44%; P = 0.05). The CXA > 135 degrees was found to be the only independent predictor associated with favorable outcomes (adjusted risk ratio 2.16; 95% CI 1.01-4.76; P = 0.047). CONCLUSION The preoperative CXA of greater than 135 degrees was identified as a prognostic factor associated with a favorable outcome at one-year follow-up after FMD among adult patients with symptomatic CM1 without basilar invagination or CVJ instability. This factor should be incorporated into preoperative considerations.
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Affiliation(s)
- Prawit Sangwanloy
- Clinical Surgical Research Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; Neurosurgery Unit, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Tanat Vaniyapong
- Clinical Surgical Research Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; Neurosurgery Unit, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Thunya Norasetthada
- Clinical Surgical Research Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; Neurosurgery Unit, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chumpon Jetjumnong
- Clinical Surgical Research Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand; Neurosurgery Unit, Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
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Klekamp J. Relevance of C1/2 facet configurations and clivus-canal-angles for adult patients with Chiari I malformation with and without basilar invagination. World Neurosurg 2022; 162:e156-e167. [PMID: 35247617 DOI: 10.1016/j.wneu.2022.02.110] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 02/24/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVE C1/2 facet configurations and clivus-canal angles (CXA) have been proposed as criteria for posterior fusion in Chiari I malformation (CMI). METHODS 340 adults with CMI without basilar invagination (BI), 111 with CMI with BI and 100 age and sex matched controls were studied using sagittal T2-weighted MRI scans analyzing pre- and postoperative values with their impact on progression-free survival rates. RESULTS For CMI without BI, C1/2 facet configurations and CXA were similar to controls (142+11° and 144+10°, respectively) with low rates for posterior C1 displacements (7.1% and 10%, respectively). In CMI with BI, C1 facet displacements were common (54.9%) with lower CXA (120+15°). After foramen magnum decompression (FMD) in CMI without BI (n = 169), 1.8% developed posterior C1 facet displacements without CXA changes and a 97% progression-free survival rate for 10 years. In CMI with BI, patients without ventral compression or instability underwent FMD without fusion (n = 19). 5.3% developed a posterior C1 facet displacement without CXA changes and a 94% progression-free survival rate for 10 years. The remainder of CMI with BI underwent FMD with C1/2 fusion (n = 48). Among these, CXA values increased with 10 year progression-free survival rates of 74% and 93% with and without ventral compression, respectively. CONCLUSION For adult CMI without BI, C1/2 facet configurations and CXA are irrelevant. FMD alone provides excellent long-term outcomes. In CMI with BI, anterior C1 facet displacements indicate C1/2 instability. Posterior fusions can be reserved for patients with ventral compression or C1/2 instability.
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Affiliation(s)
- Jörg Klekamp
- Department of Neurosurgery, Quakenbrück Christian Hospital, Quakenbrück, Germany.
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Thunstedt DC, Schmutzer M, Fabritius MP, Thorsteinsdottir J, Kunz M, Ruscheweyh R, Straube A. Headache characteristics and postoperative course in Chiari I malformation. Cephalalgia 2022; 42:879-887. [PMID: 35236163 PMCID: PMC9315190 DOI: 10.1177/03331024221079296] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Chiari I malformation typically presents with cough headache. However,
migraine-like or tension-type-like headaches may also occur. There are
limited publications on Chiari I malformation-associated headache
semiologies and the effect of foramen magnum decompression on different
headache types. Methods A retrospective analysis complemented by structured phone interviews was
performed on 65 patients with Chiari I malformation, treated at our hospital
between 2010 and 2021. Headache semiology (according to ICHD-3), frequency,
intensity, and radiological characteristics were evaluated pre- and
postoperatively. Results We included 65 patients. 38 patients were female and 27 male. Mean age was
43.9 ± 15.7 years. Headache was predominant in 41 patients (63.0%).
Twenty-one patients had cough headache and 20 had atypical headache (12
migrainous, eight tension-type headache-like). Thirty-five patients with
headache underwent surgery. Frequency, intensity, and analgesic use was
significantly reduced in cough headache (p < 0.001).
Atypical headaches improved less (p = 0.004 to 0.176).
Exploratory analysis suggested that larger preoperative tonsillar descent
correlated with larger postoperative headache intensity relief
(p = 0.025). Conclusion Decompression was effective in Chiari I malformation-related cough headache.
Atypical headache responded less well, and the causal relation with Chiari I
malformation remains uncertain. For atypical headache, decompression should
only be considered after failed appropriate preventive therapy and within an
interdisciplinary approach involving a neurologist.
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Affiliation(s)
- Dennis C Thunstedt
- Department of Neurology, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
| | - Michael Schmutzer
- Department of Neurosurgery, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
| | - Matthias P Fabritius
- Department of Radiology, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
| | - Jun Thorsteinsdottir
- Department of Neurosurgery, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
| | - Mathias Kunz
- Department of Neurosurgery, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
| | - Ruth Ruscheweyh
- Department of Neurology, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
| | - Andreas Straube
- Department of Neurology, University Hospital, Ludwig Maximilians University (LMU), Munich, Germany
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Factors Associated With Patient Reported Post-surgical Symptom Improvement in Adult Females with Chiari Malformation Type I: A Report from the Chiari1000 Dataset. World Neurosurg 2022; 161:e682-e687. [DOI: 10.1016/j.wneu.2022.02.083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/17/2022] [Accepted: 02/18/2022] [Indexed: 11/21/2022]
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Hoffman H, Bunch KM, Paul T, Krishnamurthy S. Comparison of Pericranial Autograft and AlloDerm for Duraplasty in Patients With Type I Chiari Malformation: Retrospective Cohort Analysis. Oper Neurosurg (Hagerstown) 2021; 21:386-392. [PMID: 34634804 DOI: 10.1093/ons/opab343] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 07/04/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Pericranial autograft is a popular option for duraplasty during Chiari decompression with several theoretical advantages, but comparisons to other materials have yielded mixed results. OBJECTIVE To compare outcomes between pericranial autograft and AlloDerm (BioHorizons). METHODS Consecutive suboccipital craniectomies for patients with type I Chiari malformation (CM-I) over an 8-yr period at a single institution were identified. Exclusion criteria included revision surgeries and suboccipital decompressions without duraplasty. Outcomes included incisional cerebrospinal fluid (CSF) leakage, length of stay (LOS), wound complication, aseptic meningitis, syrinx improvement, and symptomatic improvement. RESULTS A total of 101 patients (70 females and 31 males) with a median (interquartile range) age of 17 yr (11-32) met the inclusion criteria. There were 51 (50%) patients who underwent duraplasty with pericranial autograft, and the remainder underwent duraplasty with AlloDerm. There were 9 (9%) patients who experienced a postoperative CSF leak. After adjusting for confounding factors, obesity (odds ratio [OR]: 4.69, 95% CI: 1.03-25.6) and use of AlloDerm (OR: 10.54, 95% CI: 1.7-206.12) were associated with CSF leak. Wound complication occurred in 8 (8%) patients but was not associated with graft type (P = .8). Graft type was not associated with LOS, syrinx improvement, or symptom improvement. Reoperations occurred in 10 patients with 4 in the autograft group and 6 in the AlloDerm group (P = .71). CONCLUSION In patients with CM-I, expansile duraplasty with AlloDerm was associated with greater odds of CSF leakage than pericranial autograft. Obesity was also associated with increased odds of CSF leakage.
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Affiliation(s)
- Haydn Hoffman
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Katherine M Bunch
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Tyler Paul
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Satish Krishnamurthy
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, New York, USA
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Perrini P. Commentary: Comparison of Pericranial Autograft and AlloDerm for Duraplasty in Patients With Type I Chiari Malformation: Retrospective Cohort Analysis. Oper Neurosurg (Hagerstown) 2021; 21:E467-E468. [PMID: 34634818 DOI: 10.1093/ons/opab350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 07/31/2021] [Indexed: 11/12/2022] Open
Affiliation(s)
- Paolo Perrini
- Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana (AOUP), Pisa, Italy.,Department of Translational Research and New Technologies in Medicine and Surgery, Pisa University Hospital, Pisa, Italy
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Seaman SC, Li L, Menezes AH, Dlouhy BJ. Fourth ventricle roof angle as a measure of fourth ventricle bowing and a radiographic predictor of brainstem dysfunction in Chiari malformation type I. J Neurosurg Pediatr 2021; 28:260-267. [PMID: 34171843 DOI: 10.3171/2021.1.peds20756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/26/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Chiari malformation type I (CM-I) is a congenital and developmental abnormality that results in tonsillar descent 5 mm below the foramen magnum. However, this cutoff value has poor specificity as a predictor of clinical severity. Therefore, the authors sought to identify a novel radiographic marker predictive of clinical severity to assist in the management of patients with CM-I. METHODS The authors retrospectively reviewed 102 symptomatic CM-I (sCM-I) patients and compared them to 60 age-matched normal healthy controls and 30 asymptomatic CM-I (aCM-I) patients. The authors used the fourth ventricle roof angle (FVRA) to identify fourth ventricle "bowing," a configuration change suggestive of fourth ventricle outlet obstruction, and compared these results across all three cohorts. A receiver operating characteristic (ROC) curve was used to identify a predictive cutoff for brainstem dysfunction. Binary logistic regression was used to determine whether bowing of the fourth ventricle was more predictive of brainstem dysfunction than tonsillar descent, clival canal angle, or obex position in aCM-I and sCM-I patients. RESULTS The FVRA had excellent interrater reliability (intraclass correlation 0.930, 95% CI 0.905-0.949, Spearman r2 = 0.766, p < 0.0001). The FVRA was significantly greater in the sCM-I group than the aCM-I and healthy control groups (59.3° vs 41.8° vs 45.2°, p < 0.0001). No difference was observed between aCM-I patients and healthy controls (p = 0.347). ROC analysis indicated that an FVRA of 65° had a specificity of 93% and a sensitivity of 50%, with a positive predictive value of 76% for brainstem dysfunction. FVRA > 65° was more predictive of brainstem dysfunction (OR 5.058, 95% CI 1.845-13.865, p = 0.002) than tonsillar herniation > 10 mm (OR 2.564, 95% CI 1.050-6.258, p = 0.039), although increasing age was also associated with brainstem dysfunction (OR 1.045, 95% CI 1.011-1.080, p = 0.009). A clival canal angle < 140° (p = 0.793) and obex below the foramen magnum (p = 0.563) had no association with brainstem dysfunction. CONCLUSIONS The authors identified a novel radiographic measure, the FVRA, that can be used to assess fourth ventricular bowing in CM-I and is more predictive of brainstem dysfunction than tonsillar herniation. The FVRA is easy to measure, has excellent interrater variability, and can be a reliable universal radiographic measure. The FVRA will be useful in further describing CM-I radiographically and clinically by identifying patients more likely to be symptomatic as a result of brainstem dysfunction.
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Affiliation(s)
- Scott C Seaman
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
| | - Luyuan Li
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
| | - Arnold H Menezes
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
| | - Brian J Dlouhy
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
- 2Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine; and
- 3Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, Iowa
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Asghar Ali Turabi MA, Pruthi N, Bhat D, Bhagavatula ID. Complex Chiari Malformation: Proposal of a New Set of Diagnostic Criteria and Outcomes After fusion Surgery. World Neurosurg 2021; 154:e677-e682. [PMID: 34343684 DOI: 10.1016/j.wneu.2021.07.115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND The proposal of C1-C2 fusion as a better treatment option compared with foramen magnum decompression (FMD) for the treatment of Chiari 1 malformations has led to controversy. Although FMD is a time-tested treatment option, a group of patients exists who will benefit from C1-C2 fusion. We have proposed an objective system for defining complex Chiari malformations and studied the outcomes of fusion with decompression versus decompression alone for these patients. METHODS A total of 26 patients with complex Chiari malformations were identified using our criteria (any 4 of 7 clinicoradiological parameters). Of the 26 patients, 13 had undergone C1-C2 fusion with FMD and 13 had undergone FMD alone. They had also undergone pre- and postoperative clinicoradiological evaluations, and the outcomes were assessed using the Chicago Chiari outcome score. RESULTS Of the 13 patients in the fusion group, 12 (92.3%) showed improvement compared with only 6 of 13 patients (46.2%) in the nonfusion group using the Chicago Chiari outcome score, a statistically significant difference (P = 0.036, χ2 test). The mean hospital length of stay was longer for the fusion group (6.15 ± 1.46 days) than for the nonfusion group (4.38 ± 2.22 days; P = 0.02). CONCLUSIONS We have proposed a novel set of criteria for defining complex Chiari malformations. Fusion with decompression provided better outcomes than decompression alone.
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Affiliation(s)
| | - Nupur Pruthi
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, India.
| | - Dhananjaya Bhat
- Department of Neurosurgery, RV Aster Hospital, Bengaluru, India
| | - Indira Devi Bhagavatula
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, India
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Balasa A, Kunert P, Dziedzic T, Bielecki M, Kujawski S, Marchel A. Comparison of dural grafts and methods of graft fixation in Chiari malformation type I decompression surgery. Sci Rep 2021; 11:14801. [PMID: 34285298 PMCID: PMC8292506 DOI: 10.1038/s41598-021-94179-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 06/25/2021] [Indexed: 12/26/2022] Open
Abstract
Suboccipital decompression with duraplasty is a widely accepted method for treating patients with Chiari malformation type I. However, important details of the duraplasty technique are still controversial. This retrospective study analyzes clinical and radiological outcomes after surgery depending upon the type of graft and methods of graft fixation. Seventy consecutive decompressions with duraplasty were analyzed. Two types of grafts, nonautologous (Non-AutoG; 60.0%) and autologous (AutoG; 40.0%), and two methods of graft fixation, suturing (S; 67.1%) and gluing (G; 32.9%), were used in four different combinations: (Non-AutoG+S: 31.4%; Non-AutoG+G: 28.6%; AutoG+S: 35.7%; AutoG+G: 4.3%) according to surgeon preference. The mean follow-up was 63.4 months. According to gestalt and Chicago Chiari Outcome Scales, satisfactory results were obtained in 72.9% and 78.6% of cases, respectively, in the long term. The outcomes were not related to the kind of graft (p = 0.44), fixation method (p = 0.89) or duraplasty pattern (p = 0.32). Decreased syringomyelia was observed in 88.9% of cases, and no associations with the kind of graft (p = 0.84), fixation method (p = 1) or duraplasty pattern were found (p = 0.96). Pseudomeningocele occurred 5 times more often in the Non-AutoG group than in the AutoG group (52.4% vs. 10.7%; p < 0.05), whereas their formations were not related to the fixation method (p = 0.34). Three cases (12.0%) required reoperation with reduraplasty. Autologous and nonautologous dural grafts can be sutured or glued with similar clinical results; however, the use of nonautologous grafts is linked with a much higher risk of pseudomeningocele formation.
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Affiliation(s)
- Artur Balasa
- Department of Neurosurgery, Medical University of Warsaw, ul. Banacha 1a, 02-097, Warsaw, Poland
| | - Przemysław Kunert
- Department of Neurosurgery, Medical University of Warsaw, ul. Banacha 1a, 02-097, Warsaw, Poland.
| | - Tomasz Dziedzic
- Department of Neurosurgery, Medical University of Warsaw, ul. Banacha 1a, 02-097, Warsaw, Poland
| | - Mateusz Bielecki
- Department of Neurosurgery, Medical University of Warsaw, ul. Banacha 1a, 02-097, Warsaw, Poland
| | - Sławomir Kujawski
- Division of Ergonomics and Exercise Physiology, Department of Hygiene, Epidemiology, Ergonomics and Postgraduate Training, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, M. Sklodowskiej-Curie 9, 85-094, Bydgoszcz, Poland
| | - Andrzej Marchel
- Department of Neurosurgery, Medical University of Warsaw, ul. Banacha 1a, 02-097, Warsaw, Poland
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Cuthbert H, Pepper J, Price R. Spontaneous resolution of a Chiari malformation with syringomyelia. BMJ Case Rep 2021; 14:14/6/e241789. [PMID: 34155013 DOI: 10.1136/bcr-2021-241789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The Chiari I malformation (CM-I) is characterised by overcrowding of the posterior fossa and descent of the cerebellar tonsils and is associated with syringomyelia. With the increasing availability of magnetic resonance imaging, CM-I is placing a growing burden on neurosurgical services. However, its natural history remains poorly understood, and the timing and nature of surgical intervention is controversial. We present a case of a significant, symptomatic CM-I with associated syrinx which underwent complete spontaneous resolution over a 4-year period. Spontaneous regression of Chiari malformation and syringomyelia is exceedingly rare; a literature review reveals 15 other cases and only one case which underwent complete resolution. The present case and literature review suggest a more benign natural history of CM-I and support a more conservative approach to its management. Further studies are required to determine whether any factors can predict resolution for certain patient cohorts.
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Affiliation(s)
- Hadleigh Cuthbert
- Department of Neurosurgery, University Hospital of North Staffordshire NHS Trust, Stoke-on-Trent, UK
| | - Joshua Pepper
- Department of Neurosurgery, University Hospital of North Staffordshire NHS Trust, Stoke-on-Trent, UK
| | - Rupert Price
- Department of Neurosurgery, University Hospital of North Staffordshire NHS Trust, Stoke-on-Trent, UK
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Letter to the Editor Regarding "Chiari 1 Formation Redefined-Clinical and Radiographic Observations in 388 Surgically Treated Patients". World Neurosurg 2021; 145:548-549. [PMID: 33348517 DOI: 10.1016/j.wneu.2020.10.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 11/24/2022]
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Hatano K, Ohashi H, Kawamura D, Isoshima A, Nagashima H, Tochigi S, Ohashi S, Takei J, Teshigawara A, Tani S, Murayama Y, Abe T. MRI characteristics of syringomyelia associated with foramen magnum arachnoiditis: differentiation from Chiari malformation. Acta Neurochir (Wien) 2021; 163:1593-1601. [PMID: 33881607 DOI: 10.1007/s00701-021-04845-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 04/08/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND It is important to distinguish foramen magnum arachnoiditis (FMA) from Chiari malformation (CM) before surgery because the operative strategies for these diseases differ. In the current study, we compared pretreatment magnetic resonance imaging (MRI) of FMA with CM and investigated the MRI findings useful to differentiate between these diseases. METHODS We retrospectively reviewed patients with FMA or CM aged ≥ 18 years who underwent surgeries at our institution between 2007 and 2019. The morphologies of the syrinx, neural elements, and posterior cranial fossa were preoperatively evaluated with MRI. We used the receiver operating characteristic (ROC) curve for the fourth ventricle-to-syrinx distance (FVSD). RESULTS Ten patients with FMAs and 179 with CMs were included. FVSD in the FMA group was significantly shorter than that in the CM group (7.5 mm [IQR, 2.8-10 mm] in FMA vs. 29.9 mm [IQR, 16.3-52.9 mm] in CM, p < 0.0001). The other MRI findings that showed the height, size, and length of the syrinx; size of the foramen magnum; degree of cerebellar tonsillar descent; shape of the cerebellar tonsil; and dorsal subarachnoid space at the foramen magnum differed significantly between the two groups. The ROC curve analysis showed that patients whose FVSD was less than 11 mm could be diagnosed with FMA with a specificity of 90% and sensitivity of 96%. CONCLUSIONS A more cranial syrinx development (FVSD < 11 mm) appears to be the characteristic MRI finding in FMA.
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Affiliation(s)
- Keisuke Hatano
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Hiroki Ohashi
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Daichi Kawamura
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Akira Isoshima
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
- Department of Neurosurgery, Omori Red Cross Hospital, 4-30-1 Chuo, Ota-ku, Tokyo, 143-8527, Japan
| | - Hiroyasu Nagashima
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
- Department of Neurosurgery, The Jikei University Katsushika Medical Center, 6-41-2 Aoto, Katsushika-ku, Tokyo, 125-8506, Japan
| | - Satoru Tochigi
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
- Department of Neurosurgery, The Jikei University Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa-shi, Chiba, 277-8567, Japan
| | - So Ohashi
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
- Department of Neurosurgery, Kawasaki Saiwai Hospital, 31-27 Omiyacho, Kawasaki-shi Saiwai-ku, Kanagawa, 212-0014, Japan
| | - Jun Takei
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Akihiko Teshigawara
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
- Department of Neurosurgery, The Jikei University Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa-shi, Chiba, 277-8567, Japan
| | - Satoshi Tani
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Yuichi Murayama
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Toshiaki Abe
- Department of Neurosurgery, The Jikei University School of Medicine, 3-25-8 Nishishinbashi, Minato-ku, Tokyo, 105-8461, Japan
- Department of Neurosurgery, Mishima Central Hospital, 1-3 Midoricho, Mishima-shi, Shizuoka, 411-0848, Japan
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Basaran R, Bozdogan C, Senol M, Gundogan D, Isik N. Long-term outcomes of surgical management in subtypes of Chiari malformation. Neurol Res 2021; 43:760-766. [PMID: 34057045 DOI: 10.1080/01616412.2021.1934314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Objective: Chiari malformations (CMs) are a heterogeneous group of disorders defined by anatomic anomalies of the cerebellum, brainstem, and craniovertebral junction (CVJ). The aims of this study are to establish the demographic and clinical features, incidence, surgical procedures, and outcomes in large series of old and new subtypes of CMs.Material and Methods: All patients were evaluated and operated on for CM-0, 1, and 1.5 between 1985 and 2016. The patients were grouped into various subtypes. Demographic data, additional diseases, clinical features, surgical procedures, complications and outcomes were recorded.Results: 191 patients who underwent various surgical procedures were evaluated. Their mean age was 37.21 ± 9.89. We detected 15 cases of CM-0 (7.8%), 121 cases of CM-1 (63.4%), 55 cases of CM-1.5 (28.8%). In total there were 191 cases, and 220 surgical procedures were performed. 29 (13.2%) of all surgical procedure was reoperations and secondary operations. SM Cyst is found to be decreased in 72 (76.5%) patients, unchanged in 14 (14.8%) and increased in 8(8.5%) of 94 patients radiologically. Clinical outcomes are better for 131 (65.8%), same for 31 (16.2%) and worse for 9 (15%).Conclusion: This study with 172 patients is a large series that includes CM-0, 1, and 1.5 subtypes. CM-1.5 also differs for symptom presentation and durations from CM-1. There are more neurological abnormalities in patients with SM. CVD alone are an effective, useful and safe surgical procedure for CM-0, CM-1 and CM-1.5. Surgical procedure, SM existence, and symptom duration have powerful effects on outcomes.
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Affiliation(s)
- Recep Basaran
- University of Health Sciences Sancaktepe Training and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
| | - Caglar Bozdogan
- Medeniyet University Goztepe Education and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
| | - Mehmet Senol
- Medeniyet University Goztepe Education and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
| | - Dogan Gundogan
- Medeniyet University Goztepe Education and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
| | - Nejat Isik
- Medeniyet University Goztepe Education and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
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Özlen F, Kucukyuruk B, Alizada O, Guler H, Akgun MY, Kafadar AM, Tuzgen S, Sanus GZ, Hanci M. Comparison of two surgical techniques in Chiari Malformation Type 1 Patients: Duraplasty alone vs duraplasty with arachnoid dissection. Clin Neurol Neurosurg 2021; 206:106686. [PMID: 34053804 DOI: 10.1016/j.clineuro.2021.106686] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 05/09/2021] [Accepted: 05/10/2021] [Indexed: 10/21/2022]
Abstract
OBJECT Optimal surgical technique to restore the cerebrospinal fluid flow through the foramen magnum remains to be debated in Chiari malformation type 1 (CM-1) patients. METHOD This study included 46 patients with CM-1 who underwent surgical treatment by one of two methods: posterior fossa bone decompression (BD) with arachnoid preserving duraplasty (Group 1) and BD with duraplasty and arachnoid dissection (Group 2). Complaints of the patient population and neurological findings were assessed with Neck Disability Index (NDI) and Europe Quality of Life 5 Dimensions (EQ-5D) in pre- and postoperative periods. RESULTS NDI and EQ-5D scores improved in overall patient population and in each individual surgical group. Both groups showed a significant decrease in size of syringomyelia cavity. Complications resulting in recurrent treatments and re-operations occurred in 15% of patients (n = 7); six of them were from Group 2. CONCLUSION CM-1 patients benefit significantly from surgical treatment. Duraplasty should be included to surgical technique. Avoiding arachnoid dissection may lead to better results regarding complication rates.
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Affiliation(s)
- Fatma Özlen
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Baris Kucukyuruk
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey.
| | - Orkhan Alizada
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Huseyin Guler
- Department of Anesthesiology and Intensive Care Medicine, Evangelisches Waldkrankenhaus Spandau, Berlin, Germany
| | | | - Ali Metin Kafadar
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Saffet Tuzgen
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Galip Zihni Sanus
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Murat Hanci
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University - Cerrahpasa, Istanbul, Turkey
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Posterior Fossa Decompression and Duraplasty with and without Arachnoid Preservation for the Treatment of Adult Chiari Malformation Type 1: A Systematic Review and Meta-Analysis. World Neurosurg 2021; 151:e579-e598. [PMID: 33940274 DOI: 10.1016/j.wneu.2021.04.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/17/2021] [Accepted: 04/19/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND The best surgical treatment for adult Chiari malformation type 1 remains widely debated. OBJECTIVE This study aimed to assess the efficacy of posterior fossa decompression and duraplasty with arachnoid preservation compared with arachnoid dissection for the treatment of adult Chiari malformation type 1. METHODS Two reviewers (M.O.-G. and M.A.) performed a PubMed, MEDLINE, and Embase literature search using the following terms: ("Chiari" OR "Chiari 1") AND ("duraplasty" OR "arachnoid preservation" OR "arachnoid spar∗" OR "posterior fossa surgery" OR "posterior fossa decompression" OR "foramen magnum decompression"). Studies assessing the efficacy of posterior fossa decompression with duraplasty for the treatment of patients aged >18 years with Chiari malformation type 1 were included. Case reports with <10 patients, editorials, and non-English studies were excluded. RESULTS Of 195 studies identified, 24 were included for meta-analysis. In the 1006 participants, there was no difference in postoperative clinical or radiologic improvement between the 2 techniques. Patients who underwent posterior fossa decompression with duraplasty and arachnoid dissection had a greater prevalence of total complications (0.20, 95% confidence interval [CI], 0.13-0.29 vs. 0.09, 95% CI, 0.05-0.14; Q = 6.47; P = 0.01) and cerebrospinal fluid-related complications (0.15, 95% CI, 0.10-0.22 vs. 0.05, 95% CI, 0.02-0.12; Q = 4.88; P = 0.03) compared with arachnoid preservation. Furthermore, the prevalence of reoperation in the arachnoid dissection group was 25 times greater than in the arachnoid preservation group (0.08, 95% CI, 0.06-0.10 vs. 0.003, 95% CI, 0.00-0.02; Q = 10.73; P > 0.001). CONCLUSIONS Posterior fossa decompression and duraplasty with arachnoid preservation is a beneficial technique to treat Chiari malformation type 1 and reduces the risk of complications, particularly cerebrospinal fluid-related complications and the rate of reoperation.
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Zuev AA, Kostenko GV. [Treatment of syringomyelia in patients with arachnopathy within craniovertebral junction]. ZHURNAL VOPROSY NEĬROKHIRURGII IMENI N. N. BURDENKO 2021; 85:10-18. [PMID: 33560616 DOI: 10.17116/neiro20218501110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
One of the causes of syringomyelia is arachnopathy following an infectious or non-infectious inflammation of the arachnoid membrane. It is extremely rare that adhesive arachnoiditis develops within the occipital cistern and impairs cerebrospinal fluid flow from the foramen of Magendie, along posterior cerebellar surface and into spinal subarachnoid space. These process result syringomyelia. OBJECTIVE To evaluate postoperative outcomes in patients with syringomyelia following arachnopathy at the craniovertebral level. MATERIAL AND METHODS A retrospective analysis included 27 patients with syringomyelia and arachnopathy within the occipital cistern for the period from 2013 to 2018. Eight patients (29.6%) underwent primary surgery. In this group, 2 patients had arachnopathy following post-traumatic subarachnoid hemorrhage, 1 - after non-traumatic subarachnoid hemorrhage in posterior cranial fossa, 2 - after bacterial meningitis, 3 - the cause was unclear. Nineteenth patients underwent redo surgery after previous procedures on posterior cranial fossa (tumor resection - 3 patients, suboccipital decompression for Chiari malformation - 16 cases). High-resolution MRI with special protocols for analysis of CSF circulation and mobility of brain structures was used to diagnose arachnopathy (phase contrast ECG-synchronized MRI, TrueFISP). RESULTS Surgeries were aimed at mobilization of cerebellar tonsils and spinal cord and restoration of CSF circulation at the craniovertebral level. One year later, 13 (48.1%) patients noted improvement in their condition, 8 (29.6%) patients - clinical stabilization. In most cases, stabilization or improvement of sensory and coordination disorders. Syringomyelia symptoms progressed in 6 (22.2%) patients. Mean preoperative mJOA score was 11.86±1.24, in a year after surgery - 14.17±1.19. According to MRI data after 1 year, syringomyelia disappeared in 2 patients (7.4%), reduced in 13 (48.1%) cases, remained the same in 9 (33.3%) cases and deteriorated in 3 (11.1%) patients. Vaquero index reduced from 45.5% to 21.6 within a year after surgery. Early postoperative complications occurred in 3 (11.1%) patients: 1 (3.7%) had hydrocephalus and 2 (7.4%) had aseptic meningitis. CONCLUSION Modern diagnostic and surgical methods for syringomyelia ensure favorable outcomes in 77.7% of cases.
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Affiliation(s)
- A A Zuev
- Pirogov Russian National Research Medical University, Moscow, Russia
| | - G V Kostenko
- Pirogov Russian National Research Medical University, Moscow, Russia
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