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Venanzi MS, Pavanello M, Pacetti M, Secci F, Rossi A, Consales A, Piatelli G. Surgical Management of Chiari Malformation Type I in the Pediatric Population: A Single-Center Experience. J Clin Med 2024; 13:3430. [PMID: 38929960 PMCID: PMC11204403 DOI: 10.3390/jcm13123430] [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: 04/01/2024] [Revised: 06/02/2024] [Accepted: 06/04/2024] [Indexed: 06/28/2024] Open
Abstract
Background: Chiari malformation type 1 (CM-1) involves the cerebellar tonsils' descent below the foramen magnum. In Chiari malformation type 1.5 (CM-1.5), both the cerebellar tonsils and the brainstem are herniated. Common symptoms include headaches and cervical pain, often associated with conditions like syringomyelia and hydrocephalus. Surgical treatment is not performed in asymptomatic patients, while the presence of syringomyelia represents an indication for surgery. Methods: This study retrospectively examined pediatric patients with CM-1 and CM-1.5 at Giannina Gaslini Hospital from 2006 to 2020, analyzing demographics, radiological findings, surgical interventions, and outcomes. Results: Out of 211 patients who underwent surgery, 83.9% were diagnosed with CM-1 and 16.1% with CM-1.5. Headaches were prevalent (69%) and cerebellar signs were noted in 29% of patients. Syringomyelia and hydrocephalus were present in 28.4% and 8% of cases, respectively. Intraoperative ultrasonography guided interventions, with 59.8% requiring bony and ligamentous decompression, and 27.1% undergoing duraplasty. Conclusions: The surgical treatment of CM-1/CM-1.5 involves posterior cranial fossa decompression. Choosing between bony decompression alone and its combination with duraplasty has always been controversial in the pediatric population. If we consider as surgical endpoint the restoration of cerebrospinal fluid (CSF) flux, intraoperative ultrasound may be a real-time helpful tool in orienting the surgical strategy, yet refinement with quantitative measures is needed.
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Affiliation(s)
- Maria Sole Venanzi
- Neurosurgery Unit, IRCCS San Raffaele Scientific Institute, 20132 Milan, Italy
- Neurosurgery Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (A.C.); (G.P.)
| | - Marco Pavanello
- Neurosurgery Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (A.C.); (G.P.)
| | - Mattia Pacetti
- Neurosurgery Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (A.C.); (G.P.)
| | - Francesca Secci
- Neurosurgery Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (A.C.); (G.P.)
| | - Andrea Rossi
- Neuroradiology Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy;
- Department of Health Sciences (DISSAL), University of Genoa, 16126 Genoa, Italy
| | - Alessandro Consales
- Neurosurgery Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (A.C.); (G.P.)
| | - Gianluca Piatelli
- Neurosurgery Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy (A.C.); (G.P.)
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Frič R, Bryne E, Warsza B, Due-Tønnessen BJ, Eide PK. Preoperative estimation of intracranial compliance in symptomatic children with Chiari malformation type 1: impact on outcome and risk of complications. Acta Neurochir (Wien) 2024; 166:22. [PMID: 38236374 PMCID: PMC10796482 DOI: 10.1007/s00701-024-05897-3] [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: 10/26/2023] [Accepted: 12/10/2023] [Indexed: 01/19/2024]
Abstract
BACKGROUND The role of reduced intracranial compliance (ICC) in the outcome after foramen magnum decompression (FMD) was demonstrated in adults with Chiari malformation Type 1 (CMI). However, similar observations from children treated for CMI are missing. METHODS We reviewed pediatric cases of CMI referred to FMD between 2006 and 2022. Children with clinical and/or radiological signs suggesting reduced ICC (Group A) underwent overnight measurements of the pulsatile intracranial pressure (ICP): mean ICP wave amplitude (MWA) served as a surrogate marker of ICC. Children with more typical symptoms of CMI (Group B) underwent FMD without preoperative ICC estimation. This study presents the clinical, radiological, and outcome differences between these groups. RESULTS Sixty-four children (mean age 11.1 ± 4.3 years) underwent FMD: In Group A (n = 30), the finding of reduced ICC as estimated from preoperative ICP measurement resulted in CSF diversion (ventriculoperitoneal shunt) before FMD in 11 children. Two patients required shunt due to complications after FMD (total shunt rate 43%). In Group B (n = 34) treated with FMD without preoperative ICC estimation, five children (15%) required shunting due to complications. In Group A, we found a significantly higher frequency of headache, nausea, fatigue, and dizziness. The outcome assessed by the modified Chicago Chiari Outcome Scale (mean follow-up 83 ± 57 months) was comparable between the groups, but the complication rate after FMD was significantly lower in Group A (7% vs. 32%; p = 0.011). The number of procedures (ICP measurement, FMD, shunt, re-do FMD, shunt revisions) was significantly higher in Group A (2.6 ± 0.9 vs. 1.5 ± 1.1 per patient; p < 0.001). CONCLUSION In symptomatic children with CMI, the preoperative estimation of ICC from the overnight measurement of pulsatile ICP was more reliable for identifying those with reduced ICC than clinical and radiological assessment alone. When children with abnormally reduced ICC were identified and treated with CSF diversion before FMD, the complication rate was significantly reduced.
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Affiliation(s)
- Radek Frič
- Department of Neurosurgery, Oslo University Hospital-Rikshospitalet, P.O. Box 4950, N-0424, Oslo, Norway.
| | - Eline Bryne
- Department of Neurosurgery, Oslo University Hospital-Rikshospitalet, P.O. Box 4950, N-0424, Oslo, Norway
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Bogna Warsza
- Department of Radiology, Oslo University Hospital-Rikshospitalet, Oslo, Norway
| | - Bernt Johan Due-Tønnessen
- Department of Neurosurgery, Oslo University Hospital-Rikshospitalet, P.O. Box 4950, N-0424, Oslo, Norway
| | - Per Kristian Eide
- Department of Neurosurgery, Oslo University Hospital-Rikshospitalet, P.O. Box 4950, N-0424, Oslo, Norway
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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Bianchi F, Montedoro B, Frassanito P, Massimi L, Tamburrini G. Chiari I malformation: management evolution and technical innovation. Childs Nerv Syst 2023; 39:2757-2769. [PMID: 37368069 DOI: 10.1007/s00381-023-06051-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 06/22/2023] [Indexed: 06/28/2023]
Abstract
BACKGROUND AND DEFINITION In recent years thanks to the growing use of radiological assessment, Chiari I malformation became one of the major diseases for a neurosurgeon to deal with. CIM can be classified according to the extent of cerebellar tonsil tip into the foramen magnum being a protrusion over five mm considered pathological. Such a disease is a heterogeneous condition with a multifactorial pathogenetic mechanism that can subdivided into a primary and secondary form. Regardless of the form, it seems that CIM is the result of an imbalance between the volume of the braincase and its content. Acquired CIMs are secondary to conditions causing intracranial hypertension or hypotension while the pathogenesis of primary forms is still controversial. PATHOGENESIS AND TREATMENT There are several theories in the literature but the most accepted one implies an overcrowding due to a small posterior cranial fossa. While asymptomatic CIM do not need treatment, symptomatic ones prompt for surgical management. Several techniques are proposed being the dilemma centered in the need for dural opening procedures and bony decompression ones. CONCLUSION Alongside the paper, the authors will address the novelty presented in the literature on management, diagnosis and pathogenesis in order to offer a better understanding of such a heterogeneous pathology.
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Affiliation(s)
- Federico Bianchi
- Pediatric Neurosurgery, Fondazione Policlinico Gemelli IRCCS, Rome, Italy.
| | | | - Paolo Frassanito
- Pediatric Neurosurgery, Fondazione Policlinico Gemelli IRCCS, Rome, Italy
| | - Luca Massimi
- Pediatric Neurosurgery, Fondazione Policlinico Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
| | - Gianpiero Tamburrini
- Pediatric Neurosurgery, Fondazione Policlinico Gemelli IRCCS, Rome, Italy
- Università Cattolica del Sacro Cuore, Rome, Italy
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Arnautovic A, Pojskić M, Arnautović KI. Adult Chiari Malformation Type I. Neurosurg Clin N Am 2023; 34:91-104. [DOI: 10.1016/j.nec.2022.09.004] [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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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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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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7
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Soleman J, Roth J, Constantini S. Chiari Type 1 Malformation and Syringomyelia in Children: Classification and Treatment Options. Adv Tech Stand Neurosurg 2023; 48:73-107. [PMID: 37770682 DOI: 10.1007/978-3-031-36785-4_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] [Indexed: 09/30/2023]
Abstract
Chiari type 1 malformation (CIM) is defined as tonsillar ectopia of >5 mm, while syringomyelia (SM) is defined as a cerebrospinal fluid (CSF)-filled cavity larger than 3 mm dissecting the spinal cord. Over the last decades, our understanding of these pathologies has grown; however, many controversies still exist almost in every aspect of CIM and SM, including etiology, indication for treatment, timing of treatment, surgical technique, follow-up regime, and outcome. This chapter provides a comprehensive overview on different aspects of CIM and SM and on the still existing controversies, based on the evidence presently available. Future directions for clinical research concerning CIM and SM treatment and outcome are elaborated and discussed as well.
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Affiliation(s)
- Jehuda Soleman
- Department of Pediatric Neurosurgery, Tel Aviv Medical Center, Tel Aviv, Israel
- Department of Pediatric Neurosurgery, Children's University Hospital of Basel, Basel, Switzerland
- Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Jonathan Roth
- Department of Pediatric Neurosurgery, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Shlomi Constantini
- Department of Pediatric Neurosurgery, Tel Aviv Medical Center, Tel Aviv, Israel.
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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: 0] [Impact Index Per Article: 0] [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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Savchuk S, Jin MC, Choi S, Kim LH, Quon JL, Bet A, Prolo LM, Hong DS, Mahaney KB, Grant GA. Incorporating patient-centered quality-of-life measures for outcome assessment after Chiari malformation type I decompression in a pediatric population: a pilot study. J Neurosurg Pediatr 2022; 29:200-207. [PMID: 34715646 PMCID: PMC10193496 DOI: 10.3171/2021.8.peds21228] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 08/09/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Optimal management of pediatric Chiari malformation type I (CM-I) is much debated, chiefly due to the lack of validated tools for outcome assessment, with very few tools incorporating patient-centered measures of health-related quality of life (HRQOL). Although posterior fossa decompression (PFD) benefits a subset of patients, prediction of its impact across patients is challenging. The primary aim of this study was to investigate the role of patient-centered HRQOL measures in the assessment and prediction of outcomes after PFD. METHODS The authors collected HRQOL data from a cohort of 20 pediatric CM-I patients before and after PFD. The surveys included assessments of selected Patient-Reported Outcomes Measurement Information System (PROMIS) health domains and were used to generate the PROMIS preference (PROPr) score, which is a measure of HRQOL. PROMIS is a reliable standardized measure of HRQOL domains such as pain, fatigue, depression, and physical function, which are all relevant to CM-I. The authors then compared the PROPr scores with Chicago Chiari Outcome Scale (CCOS) scores derived from time-matched clinical documentation. Finally, the authors used the PROPr scores as an outcome measure to predict postsurgical HRQOL improvement at 1 year on the basis of patient demographic characteristics, comorbidities, and radiological and physical findings. The Wilcoxon signed-rank test, Mann-Whitney U-test, and Kendall's correlation were used for statistical analysis. RESULTS Aggregate analysis revealed improvement of pain severity after PFD (p = 0.007) in anatomical patterns characteristic of CM-I. Most PROMIS domain scores trended toward improvement after surgery, with anxiety and pain interference reaching statistical significance (p < 0.002 and p < 0.03, respectively). PROPr scores also significantly improved after PFD (p < 0.008). Of the baseline patient characteristics, preexisting scoliosis was the most accurate negative predictor of HRQOL improvement after PFD (median -0.095 vs 0.106, p < 0.001). A correlation with modest magnitude (Kendall's tau range 0.19-0.47) was detected between the patient-centered measures and CCOS score. CONCLUSIONS The authors observed moderate improvement of HRQOL, when measured using a modified panel of PROMIS question banks, in this pilot cohort of pediatric CM-I patients after PFD. Further investigations are necessary to validate this tool for children with CM-I and to determine whether these scores correlate with clinical and radiographic findings.
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Affiliation(s)
- Solomiia Savchuk
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Michael C. Jin
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Stephanie Choi
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Lily H. Kim
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Jennifer L. Quon
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Anthony Bet
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Laura M. Prolo
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - David S. Hong
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Kelly B. Mahaney
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
| | - Gerald A. Grant
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California
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Mantha S, Coulthard LG, Campbell R. CSF-space volumetric change following posterior fossa decompression in paediatric Chiari type-I malformation: a correlation with outcome. Childs Nerv Syst 2021; 37:3861-3869. [PMID: 34390378 DOI: 10.1007/s00381-021-05307-4] [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: 02/23/2021] [Accepted: 07/24/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE We have previously reported inferior post-operative clinical outcomes in younger children with Chiari type-I malformation (CIM). We sought to quantify the CSF volumetric changes pre- and post-decompression, in a paediatric cohort, to determine whether cisternal volume change is associated with clinical outcomes. METHODS In this retrospective clinical study, the CSF spaces of the posterior fossa (supracerebellar/quadrigeminal, prepontine, fourth ventricle, cisterna magna) were measured on magnetic resonance images pre- and post-operatively using a semi-automated method. Additionally, we describe a novel CSF space of the upper cervical canal incorporating the subarachnoid space from the foramen magnum to the inferior cortex of the C2 body, FM-C2 cistern. Morphometric measurements included the pB-C2 distance, clivoaxial angle, clival length, clival angle and Boogard's angle. Volumetric and morphometric data were correlated with clinical outcomes at 4-12 months post-operatively as measured by the Chicago Chiari Outcome Scale (CCOS). RESULTS Of 59 adequate clinical cases, 57 and 36 patients had acceptable imaging for morphometric and volumetric analysis respectively. All CSF spaces measured had a significant increase in volume post-operatively (p < 0.05). There was no correlation between the change in volume or post-operative CSF volumes and CCOS. The pre-operative volume of the FM-C2 was positively correlated with total CCOS (Wald [Formula: see text], [Formula: see text]) and was significantly smaller in the 0-6-year age group (2.38 ± 1.27 ml vs. 3.67 ± 1.56 ml, p = 0.014). No morphometric measurement changed significantly after surgery or demonstrated a relationship with CCOS. CONCLUSIONS Volumetric changes in the CSF cisterns of the posterior cranial fossa and upper cervical canal do not correlate with the age-related differences in clinical outcomes in paediatric CIM. The pre-operative volume of the FM-C2 cistern may have a role in predicting the likelihood of a beneficial post-operative outcome in paediatric CIM.
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Affiliation(s)
- Sidharth Mantha
- Kenneth G Jamieson Department of Neurosurgery, Royal Brisbane and Women's Hospital, Herston, QLD, 4029, Australia. .,School of Clinical Medicine, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4029, Australia.
| | - Liam G Coulthard
- Kenneth G Jamieson Department of Neurosurgery, Royal Brisbane and Women's Hospital, Herston, QLD, 4029, Australia.,School of Clinical Medicine, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4029, Australia
| | - Robert Campbell
- School of Clinical Medicine, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4029, Australia.,Department of Neurosurgery, Queensland Children's Hospital, South Brisbane, QLD, 4101, Australia.,Brisbane Clinical Neuroscience Centre, Mater Hospital, South Brisbane, QLD, 4101, Australia
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Gündağ Papaker M, Abdallah A, Çınar İ. Surgical Outcomes of Adult Chiari Malformation Type 1: Experience at a Tertiary Institute. Cureus 2021; 13:e17876. [PMID: 34660075 PMCID: PMC8502452 DOI: 10.7759/cureus.17876] [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] [Accepted: 09/10/2021] [Indexed: 11/12/2022] Open
Abstract
Background Chiari type I malformation (CM1) is a herniation of the caudal cerebellum and/or medulla oblongata into the upper spinal canal, occurring in pediatric and adult populations. We aimed to analyze the surgical outcomes of adult patients with CM1 consecutively treated with a posterior fossa decompression and duraplasty (PFDD) in a tertiary institution. Patients and methods We retrospectively reviewed the medical charts of 45 adult patients with CM1 who underwent PFDD at the Neurosurgery Department of our institution between January 2012 and December 2017. Radiological evaluation was based on pre- and postoperative syrinx/cord ratio, syrinx length, and regression of the ectopic cerebellar tonsils on coronal and sagittal magnetic resonance imaging (MRI) images, and clinical assessment of the patients was performed with the Chicago Chiari Outcome Scale (CCOS). Results Of the 45 patients included in the study, 25 (four men, 21 women) were diagnosed with symptomatic CM1 with an age average of 36.6±11.4 (18-66) years. Headache was the most common symptom (72.0%), while pinprick losses were prevalent in 13 (52.0%) patients. The mean postoperative CCOS score was 14.7±2.0 (8-16). Symptoms improved in 20 patients (80.0%) at the last follow-up. The mean regression in ectopic tonsils on midsagittal and coronal images were 9.1±1.8 (range: 0-16.5) mm and 8.3±1.2 (0-12.0) mm, respectively (p<0.05). The syrinxes had regressed completely or significantly in 7 (87.5%) of eight patients with syrinx. Conclusion Our findings showed that PFDD is sufficient to relieve most of the major symptoms and resolve the syrinx cavity without additional surgical interventions. The CCOS keeps its measurability of assessment of the clinical outcomes. A reliable radiological evaluation should be performed on midsagittal and coronal MRI images.
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Affiliation(s)
| | - Anas Abdallah
- Department of Neurosurgery, Aile Hospital, Istanbul, TUR
| | - İrfan Çınar
- Department of Neurosurgery, Aile Hospital, Istanbul, TUR
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Alford EN, Atchley TJ, Leon TJ, Laskay NMB, Arynchyna AA, Smith BP, Aban I, Johnston JM, Blount JP, Rozzelle CJ, Oakes WJ, Rocque BG. Imaging characteristics associated with surgery in Chiari malformation type I. J Neurosurg Pediatr 2021; 27:620-628. [PMID: 33892468 DOI: 10.3171/2020.9.peds20347] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 09/28/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE In Chiari malformation type I (CM-I), a variety of imaging findings have been purported to be important; however, results have been inconclusive, inconsistent, or not replicated in independent studies. The purpose of this study was to report imaging characteristics for a large cohort of patients with CM-I and identify the imaging findings associated with surgical decompression. METHODS Patients were identified using ICD-9 codes for CM-I for the period from 1996 to 2017. After review of the medical records, patients were excluded if they 1) did not have a diagnosis of CM-I, 2) were not evaluated by a neurosurgeon, or 3) did not have available preoperative MRI. Retrospective chart review was performed to collect demographic and clinical data. Imaging parameters were measured according to the Chiari I Malformation Common Data Elements. RESULTS A total of 731 patients were included for analysis, having a mean follow-up duration of 25.5 months. The mean age at presentation was 8.5 years. The mean tonsil position was 11.4 mm below the foramen magnum, and 62.8% of patients had a pegged tonsil shape. Two hundred patients (27.4%) underwent surgery for life-dominating tussive headache, lower cranial nerve dysfunction, syrinx, and/or brainstem dysfunction. Surgical treatment was associated with a syrinx (OR 20.4, 95% CI 12.3-33.3, p < 0.0001), CM-1.5 (OR 1.797, 95% CI 1.08-2.98, p = 0.023), lower tonsil position (OR 1.130, 95% CI 1.08-1.18, p < 0.0001), and congenital fusion of cervical vertebrae (OR 5.473, 95% CI 1.08-27.8, p = 0.040). Among patients with benign CM-I, tonsil position was statistically significantly associated with future surgery. CONCLUSIONS Comprehensive imaging characteristics for a large cohort of patients with CM-I are reported. Analysis showed that a lower tonsillar position, a syrinx, and CM-1.5 were associated with undergoing posterior fossa decompression. This study demonstrates the importance of considering imaging findings in the context of patient symptomatology.
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Affiliation(s)
| | - Travis J Atchley
- 1Division of Pediatric Neurosurgery, Department of Neurosurgery; and
| | | | | | | | | | | | - James M Johnston
- 1Division of Pediatric Neurosurgery, Department of Neurosurgery; and
| | - Jeffrey P Blount
- 1Division of Pediatric Neurosurgery, Department of Neurosurgery; and
| | - Curtis J Rozzelle
- 1Division of Pediatric Neurosurgery, Department of Neurosurgery; and
| | - W Jerry Oakes
- 1Division of Pediatric Neurosurgery, Department of Neurosurgery; and
| | - Brandon G Rocque
- 1Division of Pediatric Neurosurgery, Department of Neurosurgery; and
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Rangari K, Das KK, Singh S, Kumar KG, Bhaisora KS, Sardhara J, Mehrotra A, Srivastava AK, Jaiswal AK, Behari S. Type I Chiari Malformation Without Concomitant Bony Instability: Assessment of Different Surgical Procedures and Outcomes in 73 Patients. Neurospine 2021; 18:126-138. [PMID: 33819939 PMCID: PMC8021815 DOI: 10.14245/ns.2040438.219] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/04/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Posterior fossa decompression is the treatment of choice in type 1 Chiari malformation (CM-1) without bony instability. Although surgical fixation has been recommended by a few authors recently, comparative studies to evaluate these treatment strategies using objective outcome tools are lacking. METHODS Seventy-three patients with pure CM-1 (posterior fossa bony decompression [PFBD], n = 21; posterior fossa bony and dural decompression [PFBDD], n = 40; and posterior fixation [PF], n = 12) underwent a postoperative outcome assessment using Chicago Chiari Outcome Score (CCOS). Logistic regression analysis detected predictors of an unfavorable outcome. RESULTS Minimally symptomatic patients generally underwent a PFBD while most of the clinically severe patients underwent a PFBDD (p = 0.049). The mean CCOS score at discharge was highest in the PF (12.0 ± 1.41) and lowest in PFBDD group (10.98 ± 1.73, p = 0.087). Patients with minimal preoperative clinical disease severity (adjusted odds ratio [AOR], 4.58; 95% confidence interval [CI], 1.29-16.31) and PFBDD (AOR, 7.56; 95% CI, 1.70-33.68) represented risks for an unfavorable short-term postoperative outcome. Though long-term outcomes (CCOS) did not differ among the 3 groups (p = 0.615), PFBD group showed the best long-term improvements (mean follow-up CCOS, 13.71 ± 0.95), PFBDD group improved to a comparable degree despite a poorer short-term outcome while PF had the lowest scores. Late deteriorations (n = 3, 4.1%) occurred in the PFBDD group. CONCLUSION Minimally symptomatic patients and PFBDD predict a poor short-term postoperative outcome. PFBD appears to be a durable procedure while PFBDD group is marred by complications and late deteriorations. PF does not provide any better results than posterior fossa decompression alone in the long run.
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Affiliation(s)
- Kamlesh Rangari
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Kuntal Kanti Das
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Suyash Singh
- Department of Neurosurgery, All India Institute of Medical Sciences, Raebareli, UP, India
| | - Krishna G Kumar
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Kamlesh Singh Bhaisora
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Jayesh Sardhara
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Anant Mehrotra
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Arun Kumar Srivastava
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Awadhesh Kumar Jaiswal
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
| | - Sanjay Behari
- Department of Neurosurgery, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India
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Greenberg JK, Limbrick DD. Letter to the Editor. The Chiari Severity Index and the role of external validation. J Neurosurg Pediatr 2020; 27:241-242. [PMID: 33307522 DOI: 10.3171/2020.9.peds20796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Gallo P, Copley PC, McAllister S, Kaliaperumal C. The impact of neurosurgical technique on the short- and long-term outcomes of adult patients with Chiari I malformation. Clin Neurol Neurosurg 2020; 200:106380. [PMID: 33387726 DOI: 10.1016/j.clineuro.2020.106380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/12/2020] [Accepted: 11/21/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE This study is aimed to compare and evaluate any differences in clinical and radiological outcomes of different operative techniques of cranio-cervical decompression (CCD) performed in adults with symptomatic Chiari malformation type I (CM-1) within a single tertiary neurosurgical center. METHODS A retrospective review using the Hospital theatre management system (ORSOS) and records of patients who underwent CCD for CM-1 between January 2011 and October 2019 was performed. Patients were divided in three cohorts according to the operative technique used: an extradural osteo-ligamentous decompression (BD), BD followed by dural opening either without duraplasty (DOWD) or plus duroplasty (DOPD). The primary clinical outcome was measured by utilizing the Chicago Chiari Outcome Scale (CCOS). Syrinx outcome was measured on post-op MRI. Statistical analysis was performed using IBM SPSS 24 with α = 0.05. RESULTS 67 adults underwent 69 CCD: 10 BD, 29 DOWD and 30 DOPD. Median follow-up was 47.3 months (Interquartile Range (IQR) 26.3-73.7). Patients who underwent DOPD had a shorter median hospital stay (p-value 0.001), fewer unplanned readmissions (p-value 0.015), a higher median CCOS (p-value 0.001) and a lower post-operative complications rate (p-value 0.001) compared to patients who underwent DOWD. BD revealed a 40 % failure rate and was ineffective in cases with syringomyelia. CONCLUSION Better clinical outcomes, lower complication risk, and short duration of hospital stay were associated with patients who underwent dural opening with augmentative watertight duraplasty. Bony decompression alone despite being a very safe technique, does not appear to be reliable and effective in controlling and relieving the clinical symptoms and the syringomyelia of adult patients with CM-1.
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Affiliation(s)
- Pasquale Gallo
- Department of Clinical Neurosciences, 50 Little France Crescent, Edinburgh BioQuarter, Edinburgh, EH16 4TJ, United Kingdom.
| | - Phillip Correia Copley
- Department of Clinical Neurosciences, 50 Little France Crescent, Edinburgh BioQuarter, Edinburgh, EH16 4TJ, United Kingdom
| | - Shannon McAllister
- Department of Clinical Neurosciences, 50 Little France Crescent, Edinburgh BioQuarter, Edinburgh, EH16 4TJ, United Kingdom
| | - Chandrasekaran Kaliaperumal
- Department of Clinical Neurosciences, 50 Little France Crescent, Edinburgh BioQuarter, Edinburgh, EH16 4TJ, United Kingdom
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Yates C, Campbell R, Wood M, Chaseling R, Tollesson G, Ma N. Chiari 1 malformation: age-based outcomes in a paediatric surgical cohort. Childs Nerv Syst 2020; 36:2807-2814. [PMID: 32130483 DOI: 10.1007/s00381-020-04556-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 02/27/2020] [Indexed: 01/19/2023]
Abstract
PURPOSE Substantial evidence exists describing differences between paediatric and adult Chiari 1 malformation (CM1) patients. Differences in clinical presentation between very young (0-6 years old) and older (7-18 years old) paediatric patients is similarly well-established. However, progression on these findings with regard to surgical outcomes is limited. We aimed to establish whether inter-paediatric age group modifies surgical outcome for CM1 decompression. METHODS Retrospective chart review was conducted for 65 patients receiving posterior fossa decompression between 2006 and 2018. Presenting features, surgical management, and outcome were evaluated and stratified into very young patients (0-6 years) or older patients (7-18 years). Outcomes were assessed using the Chicago Chiari Outcome Scale (CCOS), a validated 16-point framework for comparison. RESULTS Very young patients (21 patients) scored significantly lower in surgical outcome overall compared with older patients (44 patients) (12.1 ± 3.2/16 vs 14.2 ± 1.6/16, p = 0.011), and across 3/4 CCOS subscores: non-pain symptoms, functionality, and complications. Very young patients also returned to theatre more commonly (47.6% vs 13.6%, p = 0.003), primarily for re-do decompression (7/10 patients, 70%). Finally, the presentation of very young patients differed to older patients with significantly more oropharyngeal (38.1% vs 9.0%, p = 0.014) and motor symptoms (47.6% vs 22.7%, p = 0.042). DISCUSSION Very young patients (0-6 years) do not appear to respond as well to standard posterior fossa decompression, as their older (7-18 years) paediatric counterparts, in the absence of several baseline cohort characteristic differences. We hypothesise underlying anatomical differences may contribute to this finding.
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Affiliation(s)
- Charles Yates
- Department of Neurosurgery, Queensland Children's Hospital, Brisbane, Queensland, Australia.
| | - Robert Campbell
- Department of Neurosurgery, Queensland Children's Hospital, Brisbane, Queensland, Australia
| | - Martin Wood
- Department of Neurosurgery, Queensland Children's Hospital, Brisbane, Queensland, Australia
| | - Raymond Chaseling
- Department of Neurosurgery, Queensland Children's Hospital, Brisbane, Queensland, Australia
| | - Gert Tollesson
- Department of Neurosurgery, Queensland Children's Hospital, Brisbane, Queensland, Australia
| | - Norman Ma
- Department of Neurosurgery, Queensland Children's Hospital, Brisbane, Queensland, Australia
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Loe ML, Vivas-Buitrago T, Domingo RA, Heemskerk J, Tripathi S, Bendok BR, Bydon M, Quinones-Hinojosa A, Abode-Iyamah K. Prognostic significance of C1-C2 facet malalignment after surgical decompression in adult Chiari malformation type I: a pilot study based on the Chicago Chiari Outcome Scale. J Neurosurg Spine 2020; 34:171-177. [PMID: 33065533 DOI: 10.3171/2020.6.spine20544] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 06/12/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The authors assessed the prognostic significance of various clinical and radiographic characteristics, including C1-C2 facet malalignment, in terms of surgical outcomes after foramen magnum decompression of adult Chiari malformation type I. METHODS The electronic medical records of 273 symptomatic patients with Chiari malformation type I who were treated with foramen magnum decompression, C1 laminectomy, and duraplasty at Mayo Clinic were retrospectively reviewed. Preoperative and postoperative Neurological Scoring System scores were compared using the Friedman test. Bivariate analysis was conducted to identify the preoperative variables that correlated with the patient Chicago Chiari Outcome Scale (CCOS) scores. Multiple linear regression analysis was subsequently performed using the variables with p < 0.05 on the bivariate analysis to check for independent associations with the outcome measures. Statistical software SPSS version 25.0 was used for the data analysis. Significance was defined as p < 0.05 for all analyses. RESULTS Fifty-two adult patients with preoperative clinical and radiological data and a minimum follow-up of 12 months were included. Motor deficits, syrinx, and C1-C2 facet malalignment were found to have significant negative associations with the CCOS score at the 1- to 3-month follow-up (p < 0.05), while at the 9- to 12-month follow-up only swallowing function and C1-C2 facet malalignment were significantly associated with the CCOS score (p < 0.05). Multivariate analysis showed that syrinx presence and C1-C2 facet malalignment were independently associated with the CCOS score at the 1- to 3-month follow-up. Swallowing function and C1-C2 facet malalignment were found to be independently associated with the CCOS score at the 9- to 12-month follow-up. CONCLUSIONS The observed results in this pilot study suggest a significant negative correlation between C1-C2 facet malalignment and clinical outcomes evaluated by the CCOS score at 1-3 months and 9-12 months postoperatively. Prospective studies are needed to further validate the prognostic value of C1-C2 facet malalignment and the potential role of atlantoaxial fixation as part of the treatment.
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Affiliation(s)
- Michael Lumintang Loe
- 1Department of Neurosurgery, Faculty of Medicine, Universitas Sumatera Utara/H. Adam Malik General Hospital, Medan, Indonesia
| | | | | | - Johan Heemskerk
- 2Department of Neurosurgery, Mayo Clinic, Jacksonville, Florida
| | | | | | - Mohamad Bydon
- 4Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota
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Emergency Department Visits Following Suboccipital Decompression for Adult Chiari Malformation Type I. World Neurosurg 2020; 144:e789-e796. [PMID: 32956886 PMCID: PMC7500401 DOI: 10.1016/j.wneu.2020.09.068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/13/2020] [Accepted: 09/14/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND Postoperative emergency department (ED) visits following suboccipital decompression in Chiari malformation type I (CM-1) patients are not well described. We sought to evaluate the magnitude, etiology, and significance of postoperative ED service utilization in adult CM-1 patients at a tertiary referral center. METHODS A prospectively maintained database of CM-1 patients seen at our institution between January 1, 2006 and December 31, 2019 was used. ED visits occurring within 30 days after surgery were tracked for postoperative patients, while comparing clinical, imaging, and operative characteristics between patients with and without an ED visit. Clinical improvement at last follow-up was also compared between both groups of patients in a univariable and multivariable analysis using the Chicago Chiari Outcome Scale (CCOS). RESULTS In 175 surgically treated patients, 44 (25%) visited an ED in the 1-month period after surgery. The most common reason for seeking care was isolated headache (41%), and concentration disturbance at presentation was the only factor significantly associated with a postoperative ED visit (P = 0.023). The occurrence of a postoperative ED visit was independently associated with a lower chance of clinical improvement at last follow-up (adjusted odds ratio of CCOS ≥13 = 0.35, P = 0.021; adjusted odds ratio of CCOS ≥14 = 0.38, P = 0.016). CONCLUSIONS Adult CM-1 patients undergoing surgery at a tertiary referral center have an elevated rate of postoperative ED visits, which are mostly due to pain-related complaints. Such visits are hard to predict but are associated with worse long-term clinical outcome. Interventions that decrease the magnitude of postoperative ED service utilization are warranted.
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Feghali J, Marinaro E, Xie Y, Chen Y, Li S, Huang J. Family History in Chiari Malformation Type I: Presentation and Outcome. World Neurosurg 2020; 142:e350-e356. [PMID: 32653513 DOI: 10.1016/j.wneu.2020.06.238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/28/2020] [Accepted: 06/30/2020] [Indexed: 11/16/2022]
Abstract
BACKGROUND Some patients with Chiari malformation type I (CM-1) present with a positive family history of CM-1, the significance of which remains unknown. We aimed to study whether family history affects the clinical presentation characteristics and surgical outcome of adult patients with CM-1. METHODS A database of adult patients with CM-1 presenting between January 1, 2006 and December 31, 2018 was used. Presenting characteristics were compared between patients with and without a family history (first, second, or third degree) of CM-1. Among surgically treated patients, perioperative and long-term outcomes, with favorable outcome defined as a Chiari Outcome Scale score ≥14, were compared between patients with and without CM-1 family history. All patients completed at least 6 months of postoperative follow-up. RESULTS The database consisted of 233 adult patients with CM-1, 14 of whom (6%) had a positive family history. Presenting characteristics were comparable between patients with and without a positive family history. A total of 150 patients underwent suboccipital decompression, 12 of whom (8%) had a positive family history. After a mean follow-up of 1.9 years, patients with a family history of CM-1 were significantly less likely to achieve a favorable outcome (odds ratio, 0.22; 95% confidence interval, 0.06-0.78; P = 0.019) while controlling for several covariates. Post hoc analysis showed that the difference was most significant when looking at pain symptoms. CONCLUSIONS Presentation characteristics are comparable between patients with and without a family history of CM-1. Patients with a positive family history may be less likely to respond favorably to suboccipital decompression.
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Affiliation(s)
- James Feghali
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Elizabeth Marinaro
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Yangyiran Xie
- Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland, USA
| | - Yuxi Chen
- Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland, USA
| | - Sean Li
- Pratt School of Engineering, Duke University, Durham, North Carolina, USA
| | - Judy Huang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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20
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Feghali J, Xie Y, Chen Y, Li S, Huang J. The SHORE Score: A Novel Predictive Tool for Improvement After Decompression Surgery in Adult Chiari Malformation Type I. World Neurosurg 2020; 142:e195-e202. [PMID: 32599206 DOI: 10.1016/j.wneu.2020.06.175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 06/18/2020] [Accepted: 06/21/2020] [Indexed: 01/12/2023]
Abstract
BACKGROUND A practical scoring system predicting significant improvement after surgical decompression in adult Chiari malformation type I (CM-1) based on validated outcome measures is lacking. We aimed to develop a simple score and improvement calculator to facilitate the decision making process in symptomatic CM-1 patients. METHODS We evaluated adult CM-1 patients who presented to our institution between September 2006 and September 2018 and underwent surgical decompression. Previously treated patients were excluded. Univariable analysis and multivariable logistic regression were conducted to derive an optimal model predictive of improvement on last follow-up as measured by the Chicago Chiari Outcome Scale. A score was derived using the beta coefficients of the model, and predictive performance was assessed using receiver operating curves with bootstrap validation. Finally, a web-based improvement calculator was deployed. RESULTS The surgical cohort consisted of 149 adult CM-1 patients, of which 100 (67%) experienced significant clinical improvement (Chicago Chiari Outcome Scale ≥14) after a mean follow-up of 1.9 years. The final model predictive of significant clinical improvement consisted of headache with Valsalva (odds ratio [OR] = 2.39; P = 0.030), nonwhite race (OR = 2.57; P = 0.041), absence of visual symptoms (OR = 2.59; P = 0.015), syrinx absence (OR = 1.59; P = 0.315), and increased odontoid retroflexion (OR = 2.82; P = 0.009). The score was termed SHORE, which summarizes the model's predictive factors, each assigned 1 point. The model had an area under the curve of 0.754 with an optimism-correct value of 0.721. A calculator was deployed under: https://jhuspine2.shinyapps.io/SHORE_score/. CONCLUSIONS The score and calculator can serve as supplements to clinical decision making by providing realistic and personalized expectations of postoperative outcome.
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Affiliation(s)
- James Feghali
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, USA
| | - Yangyiran Xie
- Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland, USA
| | - Yuxi Chen
- Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland, USA
| | - Sean Li
- Pratt School of Engineering, Duke University, Durham, North Carolina, USA
| | - Judy Huang
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, USA.
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Ahluwalia R, Foster J, Brooks E, Lim J, Zhao S, Gannon SR, Guidry B, Wellons J, Shannon CN. Chiari type I malformation: role of the Chiari Severity Index and Chicago Chiari Outcome Scale. J Neurosurg Pediatr 2020; 26:262-268. [PMID: 32442974 DOI: 10.3171/2020.2.peds19770] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 02/25/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The authors aimed to determine whether the Chiari Severity Index (CSI), and other clinical variables, can be used as a predictor of postoperative outcomes for Chiari type I malformation (CM-I) using the modified Chicago Chiari Outcome Scale (mCCOS) as the postoperative measure. METHODS The cohort included patients 18 years of age and younger who were treated for CM-I between 2010 and 2015 who had at least 12 months of clinical and radiographic follow-up. CSI grades were assigned using preoperative clinical and neuroimaging data. Clinical, radiographic, and operative data were obtained from medical records. Kruskal-Wallis tests and Spearman correlations were conducted to assess for differences among CSI grades. Linear and ordinal regressions were conducted to evaluate predictors of the mCCOS and its components. Statistical significance was set a priori at p < 0.05. RESULTS A total of 65 patients were included in the final cohort. The average age at the time of surgery and the mean mCCOS score were 9.8 ± 4.9 years and 10.4 ± 1.4, respectively. There were no significant differences in the mean mCCOS scores or CSI grades. Pre- and postoperative syrinx sizes were similar across the total patient cohort with median sizes of 7.4 and 3.7 mm, respectively. After controlling for age at the time of surgery, whether duraplasty and/or arachnoid dissection was performed, CSI preoperative score did not predict postoperative mCCOS score. No clinical variable could predict total mCCOS score. When the mCCOS was broken down into 3 subcomponents (pain, non-pain, and complications), only one relationship was identified. Those patients who presented with no headache had a statistically significant decrease in their pain (neck pain, shoulder pain, or dysesthesia in the upper extremities) as measured by the pain component of the mCCOS (χ2 [2, n = 20] = 6.43, p = 0.04). All other preclinical predictors, including CSI grades, were nonsignificant in demonstrating correlations to the mCCOS subcomponents. CONCLUSIONS CSI grade was not found to be a marker of surgical outcome as measured by the mCCOS in this study. There were no correlations between the clinical variables and covariates investigated with the mCCOS. The lack of variation in mCCOS scores across this cohort may suggest that the mCCOS is not adequate for detecting differences in postsurgical outcomes. Further investigation is warranted to make this determination.
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Affiliation(s)
- Ranbir Ahluwalia
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee.,2Florida State University College of Medicine, Tallahassee, Florida
| | - Jarrett Foster
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee.,3University of South Carolina School of Medicine, Columbia, South Carolina
| | - Earllondra Brooks
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee.,4Department of Neurology, Harvard Brigham and Women's Hospital/Massachusetts General Hospital, Boston, Massachusetts
| | - Jaims Lim
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee.,5Department of Neurological Surgery, University at Buffalo, New York
| | - Shilin Zhao
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee
| | - Stephen R Gannon
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee
| | - Bradley Guidry
- 6Vanderbilt University School of Medicine, Nashville, Tennessee; and
| | - John Wellons
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee.,7Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Chevis N Shannon
- 1Surgical Outcome Center for Kids, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee.,7Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
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22
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Feghali J, Xie Y, Chen Y, Li S, Huang J. External validation of current prediction systems of improvement after decompression surgery in Chiari malformation type I patients: can we do better? J Neurosurg 2020; 134:1466-1471. [PMID: 32357331 DOI: 10.3171/2020.2.jns20181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 02/18/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The Chiari Severity Index (CSI) and points-based algorithm of Thakar et al. are two prognostic tools that have been developed to predict the likelihood of improvement after suboccipital decompression in adult patients with Chiari malformation type I (CM-I). This study aimed to externally validate and critically evaluate these algorithms in the interest of guiding the development of improved prediction systems. METHODS A consecutive cohort of CM-I patients undergoing suboccipital decompression between September 2006 and September 2018 were included. The CSI and Thakar point score were computed for all patients, and associations with improvement were analyzed. The ability of both prediction systems to predict improvement as measured by different Chicago Chiari Outcome Scale (CCOS) cutoffs was assessed using receiver operating curve analysis. Post hoc correlations between the algorithms and different CCOS subcomponents were also assessed. RESULTS The surgical cohort was composed of 149 adult CM-I patients, of whom 39 (26%) had a syrinx. Most patients experienced improvement after surgery (80% CCOS ≥ 13; 96% CCOS ≥ 11). The proportion of patients improving decreased with increasing CSI, but the results were not statistically significant (p = 0.246). No statistically significant difference in the mean Thakar point score was identified between improved and nonimproved patients using both CCOS cutoffs (p = 0.246 for a cutoff of 13 and p = 0.480 for a cutoff of 11). The CSI had a poor ability in identifying improved patients at a CCOS cutoff of 13 (area under the curve [AUC] 0.582) and 11 (AUC 0.646). The Thakar point score similarly had poor discrimination at a cutoff of 13 (AUC 0.467) and 11 (AUC 0.646). Neither algorithm had significant correlation with any of the CCOS subcomponents except for CSI and nonpain symptom improvement (coefficient = -0.273, p = 0.001). CONCLUSIONS Previously published algorithms failed to provide prediction value with regard to clinically meaningful improvement following suboccipital decompression in adult CM-I patients. Future models and practical scoring systems are still required to improve the decision-making process.
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Affiliation(s)
- James Feghali
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine
| | - Yangyiran Xie
- 2Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland; and
| | - Yuxi Chen
- 2Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland; and
| | - Sean Li
- 3Pratt School of Engineering, Duke University, Durham, North Carolina
| | - Judy Huang
- 1Department of Neurosurgery, Johns Hopkins University School of Medicine
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Luciano MG, Batzdorf U, Kula RW, Rocque BG, Maher CO, Heiss J, Martin BA, Bolognese PA, Ashley-Koch A, Limbrick D, Poppe DJ, Esposito KM, Odenkirchen J, Esterlitz JR, Ala’i S, Joseph K, Feldman RS, Riddle R. Development of Common Data Elements for Use in Chiari Malformation Type I Clinical Research: An NIH/NINDS Project. Neurosurgery 2019; 85:854-860. [PMID: 30690581 PMCID: PMC7054710 DOI: 10.1093/neuros/nyy475] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Indexed: 12/28/2022] Open
Abstract
The management of Chiari I malformation (CMI) is controversial because treatment methods vary and treatment decisions rest on incomplete understanding of its complex symptom patterns, etiologies, and natural history. Validity of studies that attempt to compare treatment of CMI has been limited because of variable terminology and methods used to describe study subjects. The goal of this project was to standardize terminology and methods by developing a comprehensive set of Common Data Elements (CDEs), data definitions, case report forms (CRFs), and outcome measure recommendations for use in CMI clinical research, as part of the CDE project at the National Institute of Neurological Disorders and Stroke (NINDS) of the US National Institutes of Health. A working group, comprising over 30 experts, developed and identified CDEs, template CRFs, data dictionaries, and guidelines to aid investigators starting and conducting CMI clinical research studies. The recommendations were compiled, internally reviewed, and posted online for external public comment. In October 2016, version 1.0 of the CMI CDE recommendations became available on the NINDS CDE website. The recommendations span these domains: Core Demographics/Epidemiology; Presentation/Symptoms; Co-Morbidities/Genetics; Imaging; Treatment; and Outcome. Widespread use of CDEs could facilitate CMI clinical research trial design, data sharing, retrospective analyses, and consistent data sharing between CMI investigators around the world. Updating of CDEs will be necessary to keep them relevant and applicable to evolving research goals for understanding CMI and its treatment.
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Affiliation(s)
- Mark G Luciano
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland
| | - Ulrich Batzdorf
- Department of Neurosurgery, University of California Los Angeles, Los Angeles, California
| | - Roger W Kula
- Chiari Neurosurgical Center at Neurological Surgery, P.C., Lake Success, New York
| | - Brandon G Rocque
- Department of Neurosurgery, University of Alabama, Birmingham, Alabama
| | - Cormac O Maher
- Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - John Heiss
- Division of Intramural Research, National Institutes of Health/National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
| | - Bryn A Martin
- Department of Biological Engineering, University of Idaho, Moscow, Idaho
| | - Paolo A Bolognese
- Chiari Neurosurgical Center at Neurological Surgery, P.C., Lake Success, New York
| | | | - David Limbrick
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, Missouri
| | | | | | - Joanne Odenkirchen
- Division of Neuroscience, National Institutes of Health/National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
| | | | | | | | | | - Robert Riddle
- Division of Neuroscience, National Institutes of Health/National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
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Low SYY, Ng LP, Tan AJL, Low DCY, Seow WT. The Seow Operative Score (SOS) as a decision-making adjunct for paediatric Chiari I malformation: a preliminary study. Childs Nerv Syst 2019; 35:1777-1783. [PMID: 31175390 DOI: 10.1007/s00381-019-04226-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 05/23/2019] [Indexed: 01/19/2023]
Abstract
PURPOSE The natural history of Chiari I malformation (C1M) in the paediatric population is poorly understood. There are conflicting reports with regards to surgical indications, operative techniques and peri-operative prognostic indicators. In this paper, we report our institutional experience in the management of paediatric C1M. METHODS The workflow process which includes preferred imaging modalities, surgical techniques and indications for intervention is discussed. In particular, we describe one of our current projects-an in-house designed Seow Operative Score (SOS) as a feasibility scoring system for neurosurgical intervention in our local cohort of paediatric C1M patients. RESULTS In our series, we have 2 groups: 10 non-operated patients versus 19 operated patients. In the non-operated group, the majority of patients had a SOS of 0 to 1. One patient had a score of 2.5 and was kept under close surveillance. Follow-up imaging demonstrated resolution of the cerebellar herniation and intraspinal syrinx. In the operated group, 17 patients had a SOS of 3 or more. Two patients had a SOS of 2. For these 2, 1 developed progressive symptoms, and the other had an extensive cervico-thoracic syrinx. Decision was made for surgery after a period of surveillance. CONCLUSIONS In this paper, we report our institutional experience in managing paediatric C1M and, at the same time, highlight salient points of our practices. Meanwhile, we advocate collective global efforts and in-depth research for better disease understanding of this challenging condition.
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Affiliation(s)
- Sharon Y Y Low
- Neurosurgical Service, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore, 229899, Singapore. .,Department of Neurosurgery, National Neuroscience Institute, Singapore, Singapore. .,SingHealth Duke-NUS Neuroscience Academic Clinical Program, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.
| | - Lee Ping Ng
- Neurosurgical Service, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore, 229899, Singapore
| | - Audrey J L Tan
- Neurosurgical Service, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore, 229899, Singapore
| | - David C Y Low
- Neurosurgical Service, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore, 229899, Singapore.,Department of Neurosurgery, National Neuroscience Institute, Singapore, Singapore.,SingHealth Duke-NUS Neuroscience Academic Clinical Program, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Wan Tew Seow
- Neurosurgical Service, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore, 229899, Singapore.,Department of Neurosurgery, National Neuroscience Institute, Singapore, Singapore.,SingHealth Duke-NUS Neuroscience Academic Clinical Program, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
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Hersh DS, Groves ML, Boop FA. Management of Chiari malformations: opinions from different centers-a review. Childs Nerv Syst 2019; 35:1869-1873. [PMID: 31127344 DOI: 10.1007/s00381-019-04176-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 04/25/2019] [Indexed: 01/31/2023]
Abstract
PURPOSE Surgical decision-making in Chiari malformation type I (CM-I) patients tends to depend on the presence of neurological signs and symptoms, syringomyelia, and/or scoliosis, but significant variability exists from center to center. Here, we review the symptoms of CM-I in children and provide an overview of the differences in opinion regarding surgical indications, preferred surgical techniques, and measures of outcome. METHODS A review of the literature was performed to identify publications relevant to the surgical management of pediatric CM-I patients. RESULTS Most surgeons agree that asymptomatic patients without syringomyelia should not undergo prophylactic surgery, while symptoms of brainstem compression and/or lower cranial nerve dysfunction warrant surgery. Patients between these extremes, however, remain controversial, as does selection of the most appropriate surgical technique. CONCLUSIONS The optimal surgical procedure for children with CM-I remains a point of contention, and widespread variability exists between and within centers.
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Affiliation(s)
- David S Hersh
- Semmes-Murphey Neurologic & Spine Institute, Memphis, TN, USA.,Le Bonheur Children's Hospital, Memphis, TN, USA
| | - Mari L Groves
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Frederick A Boop
- Semmes-Murphey Neurologic & Spine Institute, Memphis, TN, USA. .,Le Bonheur Children's Hospital, Memphis, TN, USA. .,Semmes-Murphey Neurologic & Spine Institute, Memphis, TN, 38120, USA.
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Outcomes and complications for individual neurosurgeons for the treatment of Chiari I malformation at a children's hospital. Childs Nerv Syst 2019; 35:1895-1904. [PMID: 31127343 DOI: 10.1007/s00381-019-04201-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/08/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE The aim of this study was to evaluate the outcomes and complications for individual surgeons at British Columbia Children's Hospital for the treatment of Chiari I Malformation (CMI) in children. METHODS This was a retrospective review of patients with CMI who had surgery from 1986 to 2015. We assessed the Chicago Chiari Outcome Scores (CCOS) and complication rates by surgeon. RESULTS Seventy patients, 38 males and 32 females, underwent posterior fossa decompression including 14 extradural and 56 intradural approaches. Syringomyelia was present in 74.3%. Most syringomyelia improved with no difference between intradural and extradural surgeries. After initial surgery, 13 patients (18.6%) had complications including 2/14 (14.3%) of extradural and 11/56 (19.6%) of intradural surgeries. Two patients required surgical intervention for complications whereas 11 had transient complications. The complication rate by surgeon ranged from 11 to 20% for extradural (2 surgeons only) and 10.5 to 40% for intradural surgeries (4 surgeons). The CCOS ranged from 12 to 15 for extradural and 6 to 16 for intradural. The CCOS ranges for surgeons 1 and 2 were 12-15 and 13-15 respectively for extradural. The CCOS ranges for surgeons 1, 2, 3, and 4 were 12-16, 6-15, 12-16, and 12-16 respectively for intradural. Thirteen patients had a second surgery for CMI. The final CCOS was good in 86% and moderate in 14%. CONCLUSION There was variability in surgeries performed at BCCH by different surgeons, with variations in CCOS and complication rates. This information is important during decision making, consent process, and for quality improvement.
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Kumar A, Pruthi N, Devi BI, Gupta AK. Response of Syrinx Associated with Chiari I Malformation to Posterior Fossa Decompression with or without Duraplasty and Correlation with Functional Outcome: A Prospective Study of 22 Patients. J Neurosci Rural Pract 2019; 9:587-592. [PMID: 30271056 PMCID: PMC6126299 DOI: 10.4103/jnrp.jnrp_10_18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background The aim of the study is to correlate the surgical outcome with radiological changes in patients with Chiari I malformation (CMI) with syrinx. We also compared long-term functional and radiographic outcome in CM1 patients treated with posterior fossa decompression (PFD) with or without duroplasty. Patients and Methods From December 2013 to October 2015, 22 patients who underwent surgery with the diagnosis of CMI and syrinx were included in the study. Measurements were performed on preoperative and postoperative magnetic resonance (MR) scans using the same software. All patients underwent PFD with or without duroplasty. Clinical results were evaluated on the basis of the Chicago Chiari Outcome Scale (CCOS). We assessed the degree of resolution of syrinx and outcome of Chiari decompression with PFD versus PFD with duroplasty. Mean duration of follow-up was 12.4 ± 5.37 months (range: 6-24 months). Results Out of 19 patients in whom syrinx diameter decreased on postoperative MR imaging, 17 (89.5%) improved based on CCOS and 2 (10.5%) were unchanged while out of three patients in whom syrinx worsened, 2 (66.7%) improved and 1 (33.3%) was unchanged (P = 0.37). The cord diameter was found to have decreased in 12 patients and of these 11 (91.7%) improved. The cord diameter increased in 10 patients, but 8 (80%) improved (P = 0.57). The mean changes in syrinx, cord, and syrinx/cord ratio were studied in both groups with and without duroplasty, were not statistically significant. In this study, radiological parameters failed to predict functional outcome. Conclusions The outcome does not correlate with change in any of the syrinx-related factors. Surgical decompression with or without duroplasty does not have a statistically significant relationship in the degree of syrinx resolution. Surgical decompression without duroplasty provides the benefits of surgical decompression while avoiding the complications of intradural techniques.
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Affiliation(s)
- Anil Kumar
- Department of Neurosurgery, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
| | - Nupur Pruthi
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - B Indira Devi
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Arun Kumar Gupta
- Department of Neuroimaging and Interventional Neuroradiology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Liu Z, Hao Z, Hu S, Zhao Y, Li M. Predictive value of posterior cranial fossa morphology in the decompression of Chiari malformation type I: A retrospective observational study. Medicine (Baltimore) 2019; 98:e15533. [PMID: 31083202 PMCID: PMC6531207 DOI: 10.1097/md.0000000000015533] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Posterior fossa decompression (PFD) is the standard procedure for the treatment of Chiari malformation type I (CMI). Although most patients have satisfactory surgical outcomes, some show no improvement or even a worsening of symptoms. Patient selection is thought to account for these different surgical outcomes. Our aim was to evaluate the predictive value of the preoperative posterior cranial fossa (PCF) morphology on the efficacy of PFD.Data from 39 CMI patients with CMI-related symptoms who underwent occipital foramen enlargement + C-1 laminectomy + enlarged duraplasty were retrospectively collected from January 2011 to May 2018. The patients were divided into improved and unimproved groups according to the modified Chicago Chiari Outcome Scale. Demographic information and clinical history, including preoperative comorbidities and clinical manifestations, were recorded for the 2 groups and compared. PCF morphology was assessed based on 13 linear, 8 angular, 4 areal parameters and 4 ratios related to these liner and areal parameters. The data were then analyzed statistically.Of the 39 patients with CMI, 24 showed improvement after PFD (61.5%), whereas the remaining 15 patients showed no improvement (38.5%). The preoperative symptoms lasted 1 to 240 months, with a median of 24 months. The follow-up period ranged from 2 to 82 months, with a median of 27 months. The improved and unimproved groups differed significantly with regard to upper limb numbness (OR = 10, P = .02) and upper limb weakness (OR = 4.86, P = .02). The 2 groups did not differ significantly with regard to any morphological parameters such as tonsillar descent, syrinx size.Preoperative upper limb numbness and upper limb weakness are unfavorable factors that influence the outcome of PFD in patients with CMI. However, the morphology of PCF cannot predict the response to PFD in patients with CMI.
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Takeshima Y, Matsuda R, Nishimura F, Nakagawa I, Motoyama Y, Park YS, Nakase H. Sequential Enlargement of Posterior Fossa After Duraplasty for Chiari Malformation Type 1. World Neurosurg X 2019; 2:100004. [PMID: 31218279 PMCID: PMC6580881 DOI: 10.1016/j.wnsx.2018.100004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 12/10/2018] [Indexed: 11/24/2022] Open
Abstract
Objective There are several material options for duraplasty in surgery for foramen magnum decompression (FMD). We retrospectively analyzed surgical results and the impact of sequential alteration of posterior fossa (PF) size in patients with Chiari malformation type 1 after duraplasty using local fascia. Methods The patients with Chiari malformation type 1 who underwent FMD with duraplasty using local fascia at our institution between 2004 and 2015 were included in the study. Some pediatric patients who underwent FMD without duraplasty and patients with insufficient follow-up data were excluded. Improvement of clinical signs, regression of syrinx, and temporal alteration of PF size were analyzed with perioperative magnetic resonance imaging. Postoperative clinical outcomes were evaluated at the final follow-up using the Chicago Chiari Outcome Scale. Correlations between the PF size alteration and size of dural patch or Chicago Chiari Outcome Scale were statistically analyzed. Results Twelve patients were included in this study. The mean age of the patients was 31.9 (range, 18–48) years. Syrinx was incorporated in 11 patients and regressed postoperatively in all patients. The PF was significantly enlarged sequentially over time (P < 0.05). The degree of enlargement was positively correlated with size of the fascial patch (r = 0.540). Postoperative clinical outcomes at final follow-up were positively correlated with the degree of PF enlargement (r = 0.678). Conclusions The PF was enlarged sequentially over time after duraplasty using local fascia. The degree of enlargement was positively correlated with the size of the fascial patch and the likelihood of a favorable postoperative outcome.
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Affiliation(s)
- Yasuhiro Takeshima
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Ryosuke Matsuda
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Fumihiko Nishimura
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Ichiro Nakagawa
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Yasushi Motoyama
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Young-Soo Park
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
| | - Hiroyuki Nakase
- Department of Neurosurgery, Nara Medical University School of Medicine, Kashihara, Japan
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Clinical Characteristics, Imaging Findings and Surgical Outcomes of Chiari Malformation Type I in Pediatric and Adult Patients. Curr Med Sci 2018; 38:289-295. [DOI: 10.1007/s11596-018-1877-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/28/2018] [Indexed: 10/17/2022]
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Gupta R, Ascanio LC, Enriquez-Marulanda A, Griessenauer CJ, Chinnadurai A, Jhun R, Alturki A, Ogilvy CS, Thomas AJ, Moore JM. In Reply to the Letter to the Editor "Validation of Predictive Scoring System for Ventriculoperitoneal Shunt Insertion After Aneurysmal Subarachnoid Hemorrhage: Statistical and Methodologic Issues". World Neurosurg 2017; 109:511. [PMID: 29232818 DOI: 10.1016/j.wneu.2017.10.125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 10/21/2017] [Indexed: 11/30/2022]
Affiliation(s)
- Raghav Gupta
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Luis C Ascanio
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Christoph J Griessenauer
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Anu Chinnadurai
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Ray Jhun
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Abdulrahman Alturki
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Christopher S Ogilvy
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Ajith J Thomas
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Justin M Moore
- Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.
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Surgical Decompression for Chiari Malformation Type I: An Age-Based Outcomes Study Based on the Chicago Chiari Outcome Scale. World Neurosurg 2017; 107:285-290. [DOI: 10.1016/j.wneu.2017.07.162] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 07/25/2017] [Accepted: 07/27/2017] [Indexed: 11/19/2022]
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Predictive Factors of Headache Resolution After Chiari Type 1 Malformation Surgery. World Neurosurg 2017; 110:e60-e66. [PMID: 29066319 DOI: 10.1016/j.wneu.2017.10.070] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 01/03/2023]
Abstract
BACKGROUND Headache is the main and often isolated symptom of patients with Chiari type 1 malformation (CM1). Classically described as occipital and exacerbated by cough, headaches may be poorly characterized, making it difficult to establish CM1 as the underlying cause. Current guidelines for surgical posterior fossa decompression are undefined. The challenge is to distinguish headaches related to CM1 from headaches coincidentally coexisting with CM1. We aimed to determine predictive factors of headache resolution after surgery and applied to our cohort the Chiari Severity Index, a recently developed predictive prognostic score. METHODS This retrospective study enrolled 49 patients with CM1 and preoperative headache. Standardized telephone interviews regarding headaches before and after surgery were conducted by the same neurologist; magnetic resonance imaging morphometric analyses were performed by an independent neuroradiologist. Headache resolution was defined as ≥50% reduction in frequency of headache days. RESULTS Preoperative factors of headache resolution after multivariate analysis were attack duration <5 minutes (P = 0.001), triggering by Valsalva maneuvers (P = 0.003), severe intensity of attack (P = 0.05), occipital location (P = 0.05), and greater number of headache days per month (P = 0.04). These characteristics are part of International Headache Society diagnostic criteria for headache attributed to CM1. No radiologic predictive factor was demonstrated. Postoperative improvement was inversely correlated with Chiari Severity Index. CONCLUSIONS This study confirms the relevance of International Headache Society criteria to identify headaches related to CM1. We propose their systematic use in a preoperative questionnaire.
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Liu H, Yang C, Yang J, Xu Y. Pediatric Chiari malformation type I: long-term outcomes following small-bone-window posterior fossa decompression with autologous-fascia duraplasty. Exp Ther Med 2017; 14:5652-5658. [PMID: 29285106 DOI: 10.3892/etm.2017.5211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 03/03/2017] [Indexed: 12/14/2022] Open
Abstract
Chiari malformation type I (CM-I) is a common hindbrain disorder that is associated with deformity and elongation of the cerebellar tonsils. Although CM-I occurs in both pediatric and adult patients, its prevalence, clinical features and management in the pediatric population are not well defined. The current study evaluated a consecutive case series of 92 children (38 females and 54 males) who were diagnosed with congenital CM-I. All patients underwent small-bone-window posterior fossa decompression with autologous-fascia duraplasty. Clinical and radiological features were analyzed and long-term follow-up data were recorded. Risk factors associated with clinical outcomes were investigated using comprehensive statistical methods. Out of the 92 children, 11 (12.0%) were asymptomatic. Associated ventricular dilation was observed in 24 children (26.1%) and concomitant syringomyelia was observed in 72 children (78.3%). A total of 44 children (47.8%) showed scoliosis on plain films. Follow-up data (mean duration, 88.6 months) were available for all patients. Syringomyelia was absent or markedly reduced in 56 patients (77.8%). Symptoms were alleviated in 66 patients, remained unchanged in 12 patients and progressed in 3 patients. Statistical analysis indicated that the cerebellar tonsillar descent (CTD) grade, basilar invagination and platybasia influenced the clinical outcome (P<0.05). In conclusion, early recognition and surgical treatment of CM-I in pediatric patients can lead to good outcomes. The current results suggested that small-bone-window posterior fossa decompression with autologous-fascia duraplasty was an effective safe treatment option with a low complication rate. High CTD grade, basilar invagination and platybasia were indicated to be predictors of poor clinical prognosis.
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Affiliation(s)
- Hai Liu
- Department of Neurosurgery, China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Chenlong Yang
- Department of Neurosurgery, China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Jun Yang
- Department of Neurosurgery, China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Yulun Xu
- Department of Neurosurgery, China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, P.R. China
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Májovský M, Netuka D, Beneš V. Conservative and Surgical Treatment of Patients with Pineal Cysts: Prospective Case Series of 110 Patients. World Neurosurg 2017; 105:199-205. [PMID: 28583453 DOI: 10.1016/j.wneu.2017.05.155] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/24/2017] [Accepted: 05/25/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND A pineal cyst is a relatively common benign condition of the pineal gland. The clinical management of patients with a pineal cyst remains controversial, especially when patients present with nonspecific symptoms. METHODS We performed a prospective study between 2000 and 2016. All patients with a pineal cyst >7 mm were included. Epidemiologic data, presenting symptoms, surgical results, and radiographic and clinical follow-up were documented. RESULTS A total of 110 patients were enrolled in the present study. The most common presenting symptoms were tension headache (62.7%), vertigo (16.4%), migraine (12.7%), syncope (10.9%), nausea (8.2%), and diplopia (8.2%). Symptoms worsened during the follow-up period in 17 patients (15.5%), improved in 13 patients (11.8%), and remained stable in 81 patients (73.6%). The mean follow-up was 79.2 months. A pineal cyst increased in size during the follow-up in 6 patients (5.5%) and decreased in size in 9 patients (8.2%). Twenty-one patients underwent pineal cyst resection; 20 patients (95.2%) reported some improvement in their presenting symptoms, and 10 patients (47.6%) were symptom free after the surgery. CONCLUSION We present the largest clinical series of patients with pineal cysts. Surgery, if indicated properly, is a legitimate treatment modality for symptomatic patients with satisfactory results. Relief of symptoms, even nonspecific ones, is achieved in the majority of cases. Simple growth of the cyst in the first decades of life is a part of the natural course and should not be considered as an indication for surgery.
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Affiliation(s)
- Martin Májovský
- Department of Neurosurgery of 1st Faculty of Medicine of Charles University and Military University Hospital, Prague, Czechoslovakia.
| | - David Netuka
- Department of Neurosurgery of 1st Faculty of Medicine of Charles University and Military University Hospital, Prague, Czechoslovakia
| | - Vladimír Beneš
- Department of Neurosurgery of 1st Faculty of Medicine of Charles University and Military University Hospital, Prague, Czechoslovakia
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Pakzaban P. Technique for Mini-open Decompression of Chiari Type I Malformation in Adults. Oper Neurosurg (Hagerstown) 2017; 13:465-470. [DOI: 10.1093/ons/opx027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 01/31/2017] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND: The technique for decompression of Chiari type I malformation relies on open exposure of craniocervical junction for suboccipital craniectomy and upper cervical laminectomy with or without duraplasty. There is no detailed technical report of a minimally invasive approach for Chiari decompression in adults.
OBJECTIVE: To describe a mini-open technique for decompression of Chiari type I malformation (including duraplasty) in adults.
METHODS: Six consecutive adult patients with symptomatic Chiari type I malformation underwent decompression through a 3 to 4 cm midline incision via a speculum retractor. All patients underwent a limited suboccipital craniectomy and C1 laminectomy with an ultrasonic bone scalpel. All patients underwent duraplasty with a synthetic dural substitute. In the 2 patients with syringomyelia, the arachnoid was opened and intradural dissection was carried out. In the remaining 4 patients, the arachnoid was left intact.
RESULTS: All operations were completed successfully through the mini-open exposure. Mean surgery time, blood loss, and length of stay were 114 min, 55 mL, and 1.3 days, respectively. Mean follow-up was 13.2 months (range 9-18). All patients had excellent clinical outcomes as defined by scores of 15 (3 patients) or 16 (3 patients) on Chicago Chiari Outcome Scale. There were no neurological complications or cerebrospinal fluid leaks. Postop computed tomography revealed good boney decompression. In the 2 patients with syringomyelia, MRI at 6 months revealed resolution of the syrinx.
CONCLUSION: Decompression of Chiari type I malformation in adults can be performed safely and effectively through the mini-open exposure described in this report.
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Alperin N, Loftus JR, Bagci AM, Lee SH, Oliu CJ, Shah AH, Green BA. Magnetic resonance imaging-based measures predictive of short-term surgical outcome in patients with Chiari malformation Type I: a pilot study. J Neurosurg Spine 2016; 26:28-38. [PMID: 27494782 DOI: 10.3171/2016.5.spine1621] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE This study identifies quantitative imaging-based measures in patients with Chiari malformation Type I (CM-I) that are associated with positive outcomes after suboccipital decompression with duraplasty. METHODS Fifteen patients in whom CM-I was newly diagnosed underwent MRI preoperatively and 3 months postoperatively. More than 20 previously described morphological and physiological parameters were derived to assess quantitatively the impact of surgery. Postsurgical clinical outcomes were assessed in 2 ways, based on resolution of the patient's chief complaint and using a modified Chicago Chiari Outcome Scale (CCOS). Statistical analyses were performed to identify measures that were different between the unfavorable- and favorable-outcome cohorts. Multivariate analysis was used to identify the strongest predictors of outcome. RESULTS The strongest physiological parameter predictive of outcome was the preoperative maximal cord displacement in the upper cervical region during the cardiac cycle, which was significantly larger in the favorable-outcome subcohorts for both outcome types (p < 0.05). Several hydrodynamic measures revealed significantly larger preoperative-to-postoperative changes in the favorable-outcome subcohort. Predictor sets for the chief-complaint classification included the cord displacement, percent venous drainage through the jugular veins, and normalized cerebral blood flow with 93.3% accuracy. Maximal cord displacement combined with intracranial volume change predicted outcome based on the modified CCOS classification with similar accuracy. CONCLUSIONS Tested physiological measures were stronger predictors of outcome than the morphological measures in patients with CM-I. Maximal cord displacement and intracranial volume change during the cardiac cycle together with a measure that reflects the cerebral venous drainage pathway emerged as likely predictors of decompression outcome in patients with CM-I.
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Ladner TR, Westrick AC, Wellons JC, Shannon CN. Health-related quality of life in pediatric Chiari Type I malformation: the Chiari Health Index for Pediatrics. J Neurosurg Pediatr 2016; 17:76-85. [PMID: 26431245 DOI: 10.3171/2015.5.peds1513] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECT The purpose of this study was to design and validate a patient-reported health-related quality of life (HRQOL) instrument for pediatric Chiari Type I malformation (CM-I), the Chiari Health Index for Pediatrics (CHIP). METHODS The CHIP has 45 items with 4 components making up 2 domain scores, physical (pain frequency, pain severity, nonpain symptoms) and psychosocial; physical and psychosocial scores are combined to create an overall HRQOL score. Increasing scores (0 to 1) represent increasing HRQOL. Fifty-five patients with CM-I (mean age 12 ± 4 years, 53% male) were enrolled and completed the CHIP and Health Utilities Index Mark 3 (HUI3). Twenty-five healthy controls (mean age 11.9 ± 4 years, 40% male) also completed the CHIP. CHIP scores were compared between these groups via the Mann-Whitney U-test. For CHIP discriminative function, subscore versus presence of CM-I was compared via receiver operating characteristic curve analysis. CHIP scores in the CM-I group were stratified by symptomatology (asymptomatic, headaches, and paresthesias) and compared via Kruskal-Wallis test with Mann-Whitney U-test with Bonferroni correction (p < 0.0167). CHIP was compared with HUI3 (Health Utilities Index Mark 3) via univariate and multivariate linear regression. RESULTS CHIP physical and psychosocial subscores were, respectively, 24% and 18% lower in CM-I patients than in controls (p < 0.001); the overall HRQOL score was 23% lower as well (p < 0.001). The area under the curve (AUC) for CHIP physical subscore versus presence of CM-I was 0.809. CHIP physical subscore varied significantly with symptomatology (p = 0.001) and HUI3 pain-related quality of life (R(2) = 0.311, p < 0.001). The AUC for CHIP psychosocial subscore versus presence of CM-I was 0.754. CHIP psychosocial subscore varied significantly with HUI3 cognitive- (R(2) = 0.324, p < 0.001) and emotion-related (R(2) = 0.155, p = 0.003) quality of life. The AUC for CHIP HRQOL versus presence of CM-I was 0.820. Overall CHIP HRQOL score varied significantly with symptomatology (p = 0.001) and HUI3 multiattribute composite HRQOL score (R(2) = 0.440, p < 0.001). CONCLUSIONS The CHIP is a patient-reported, CM-I-specific HRQOL instrument, with construct validity in assessing pain-, cognitive-, and emotion-related quality of life, as well as symptomatic features unique to CM-I. It holds promise as a discriminative HRQOL index in CM-I outcomes assessment.
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Affiliation(s)
- Travis R Ladner
- Department of Neurological Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Ashly C Westrick
- Department of Neurological Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - John C Wellons
- Department of Neurological Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Chevis N Shannon
- Department of Neurological Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
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Greenberg JK, Yarbrough CK, Radmanesh A, Godzik J, Yu M, Jeffe DB, Smyth MD, Park TS, Piccirillo JF, Limbrick DD. The Chiari Severity Index: a preoperative grading system for Chiari malformation type 1. Neurosurgery 2015; 76:279-85; discussion 285. [PMID: 25584956 DOI: 10.1227/neu.0000000000000608] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND To develop evidence-based treatment guidelines for Chiari malformation type 1 (CM-1), preoperative prognostic indices capable of stratifying patients for comparative trials are needed. OBJECTIVE To develop a preoperative Chiari Severity Index (CSI) integrating the clinical and neuroimaging features most predictive of long-term patient-defined improvement in quality of life (QOL) after CM-1 surgery. METHODS We recorded preoperative clinical (eg, headaches, myelopathic symptoms) and neuroimaging (eg, syrinx size, tonsillar descent) characteristics. Brief follow-up surveys were administered to assess overall patient-defined improvement in QOL. We used sequential sequestration to develop clinical and neuroimaging grading systems and conjunctive consolidation to integrate these indices to form the CSI. We evaluated statistical significance using the Cochran-Armitage test and discrimination using the C statistic. RESULTS Our sample included 158 patients. Sequential sequestration identified headache characteristics and myelopathic symptoms as the most impactful clinical parameters, producing a clinical grading system with improvement rates ranging from 81% (grade 1) to 58% (grade 3) (P = .01). Based on sequential sequestration, the neuroimaging grading system included only the presence (55% improvement) or absence (74% improvement) of a syrinx ≥6 mm (P = .049). Integrating the clinical and neuroimaging indices, improvement rates for the CSI ranged from 83% (grade 1) to 45% (grade 3) (P = .002). The combined CSI had moderately better discrimination (c = 0.66) than the clinical (c = 0.62) or neuroimaging (c = 0.58) systems alone. CONCLUSION Integrating clinical and neuroimaging characteristics, the CSI is a novel tool that predicts patient-defined improvement after CM-1 surgery. The CSI may aid preoperative counseling and stratify patients in comparative effectiveness trials.
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Affiliation(s)
- Jacob K Greenberg
- Departments of *Neurological Surgery, ‡Otolaryngology, and §Medicine, ¶Mallincrodt Institute of Radiology, Washington University School of Medicine in St. Louis, St. Louis, Missouri
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Yarbrough CK, Greenberg JK, Park TS. Clinical Outcome Measures in Chiari I Malformation. Neurosurg Clin N Am 2015; 26:533-41. [PMID: 26408063 DOI: 10.1016/j.nec.2015.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Chiari malformation type 1 (CM-I) is a common and often debilitating neurologic disease. Reliable evaluation of treatments has been hampered by inconsistent use of clinical outcome measures. A variety of outcome measurement tools are available, although few have been validated in CM-I. The recent development of the Chicago Chiari Outcome Scale and the Chiari Symptom Profile provides CM-I-specific instruments to measure outcomes in adults and children, although validation and refinement may be necessary.
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Affiliation(s)
- Chester K Yarbrough
- Department of Neurological Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8057, St. Louis, MO 63110, USA.
| | - Jacob K Greenberg
- Department of Neurological Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8057, St. Louis, MO 63110, USA
| | - Tae Sung Park
- Department of Neurological Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8057, St. Louis, MO 63110, USA; Department of Neurological Surgery, St Louis Children's Hospital, Suite 4S20, St Louis, MO 63110, USA
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Pomeraniec IJ, Ksendzovsky A, Yu PL, Jane JA. Surgical History of Sleep Apnea in Pediatric Patients with Chiari Type 1 Malformation. Neurosurg Clin N Am 2015; 26:543-53. [PMID: 26408064 DOI: 10.1016/j.nec.2015.06.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Sleep apnea represents a relative indication for posterior fossa decompression in pediatric patients with Chiari malformation type 1. Duraplasty was associated with improvement of sleep apnea in 100% of patients and dural splitting with improvement in 50% of patients. Duraplasty and dural splitting were associated with a similar reduction in tonsillar herniation on radiographic imaging of 58% (37% excluding tonsillectomy) and 35%, respectively. Longitudinal follow-up studies of patients with either neurologic deficits or severe symptoms will further elucidate the natural history of Chiari malformation type 1 and more appropriately gauge the risk-benefit tradeoff of surgical intervention.
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Affiliation(s)
- Isaac Jonathan Pomeraniec
- Department of Neurological Surgery, University of Virginia Health Science Center, 1215 Lee Street, Charlottesville, VA 22908, USA
| | - Alexander Ksendzovsky
- Department of Neurological Surgery, University of Virginia Health Science Center, 1215 Lee Street, Charlottesville, VA 22908, USA
| | - Pearl L Yu
- Department of Neurological Surgery, University of Virginia Health Science Center, 1215 Lee Street, Charlottesville, VA 22908, USA
| | - John A Jane
- Department of Neurological Surgery, University of Virginia Health Science Center, 1215 Lee Street, Charlottesville, VA 22908, USA.
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Ladner TR, Dewan MC, Day MA, Shannon CN, Tomycz L, Tulipan N, Wellons JC. Evaluating the relationship of the pB-C2 line to clinical outcomes in a 15-year single-center cohort of pediatric Chiari I malformation. J Neurosurg Pediatr 2015; 15:178-88. [PMID: 25479579 DOI: 10.3171/2014.9.peds14176] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT The clinical significance of radiological measurements of the craniocervical junction in pediatric Chiari I malformation (CM-I) is yet to be fully established across the field. The authors examined their institutional experience with the pB-C2 line (drawn perpendicular to a line drawn between the basion and the posterior aspect of the C-2 vertebral body, at the most posterior extent of the odontoid process at the dural interface). The pB-C2 line is a measure of ventral canal encroachment, and its relationship with symptomatology and syringomyelia in pediatric CM-I was assessed. METHODS The authors performed a retrospective review of 119 patients at the Monroe Carell Jr. Children's Hospital at Vanderbilt University who underwent posterior fossa decompression with duraplasty, 78 of whom had imaging for review. A neuroradiologist retrospectively evaluated preoperative and postoperative MRI examinations performed in these 78 patients, measuring the pB-C2 line length and documenting syringomyelia. The pB-C2 line length was divided into Grade 0 (<3 mm) and Grade I (≥3 mm). Statistical analysis was performed using the t-test for continuous variables and Fisher's exact test analysis for categorical variables. Multivariate logistic and linear regression analyses were performed to assess the relationship between pB-C2 line grade and clinical variables found significant on univariate analysis, controlling for age and sex. RESULTS The mean patient age was 8.5 years, and the mean follow-up duration was 2.4 years. The mean pB-C2 line length was 3.5 mm (SD 2 mm), ranging from 0 to 10 mm. Overall, 65.4% of patients had a Grade I pB-C2 line. Patients with Grade I pB-C2 lines were 51% more likely to have a syrinx than those with Grade 0 pB-C2 lines (RR 1.513 [95% CI 1.024-2.90], p=0.021) and, when present, had greater syrinx reduction (3.6 mm vs 0.2 mm, p=0.002). Although there was no preoperative difference in headache incidence, postoperatively patients with Grade I pB-C2 lines were 69% more likely to have headache reduction than those with Grade 0 pB-C2 lines (RR 1.686 [95% CI 1.035-2.747], p=0.009). After controlling for age and sex, pB-C2 line grade remained an independent correlate of headache improvement and syrinx reduction. CONCLUSIONS Ventral canal encroachment may explain the symptomatology of select patients with CM-I. The clinical findings presented suggest that patients with Grade I pB-C lines2, with increased ventral canal obstruction, may experience a higher likelihood of syrinx reduction and headache resolution from decompressive surgery with duraplasty than those with Grade 0 pB-C2 lines.
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Radmanesh A, Greenberg JK, Chatterjee A, Smyth MD, Limbrick DD, Sharma A. Tonsillar pulsatility before and after surgical decompression for children with Chiari malformation type 1: an application for true fast imaging with steady state precession. Neuroradiology 2015; 57:387-93. [PMID: 25563631 DOI: 10.1007/s00234-014-1481-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 12/10/2014] [Indexed: 11/29/2022]
Abstract
INTRODUCTION We hypothesize that surgical decompression for Chiari malformation type 1 (CM-1) is associated with statistically significant decrease in tonsillar pulsatility and that the degree of pulsatility can be reliably assessed regardless of the experience level of the reader. METHODS An Institutional Review Board (IRB)-approved Health Insurance Portability and Accountability Act (HIPAA)-compliant retrospective study was performed on 22 children with CM-1 (8 males; mean age 11.4 years) who had cardiac-gated true-FISP sequence and phase-contrast cerebrospinal fluid (CSF) flow imaging as parts of routine magnetic resonance (MR) imaging before and after surgical decompression. The surgical technique (decompression with or without duraplasty) was recorded for each patient. Three independent radiologists with different experience levels assessed tonsillar pulsatility qualitatively and quantitatively and assessed peritonsillar CSF flow qualitatively. Results were analyzed. To evaluate reliability, Fleiss kappa for multiple raters on categorical variables and intra-class correlation for agreement in pulsatility ratings were calculated. RESULTS After surgical decompression, the degree of tonsillar pulsatility appreciably decreased, confirmed by t test, both qualitatively (p values <0.001, <0.001, and 0.045 for three readers) and quantitatively (amount of decrease/p value for three readers 0.7 mm/<0.001, 0.7 mm/<0.001, and 0.5 mm/0.022). There was a better agreement among the readers in quantitative assessment of tonsillar pulsatility (kappa 0.753-0.834), compared to qualitative assessment of pulsatility (kappa 0.472-0.496) and qualitative assessment of flow (kappa 0.056 to 0.203). Posterior fossa decompression with duraplasty led to a larger decrease in tonsillar pulsatility, compared to posterior fossa decompression alone. CONCLUSION Tonsillar pulsatility in CM-1 is significantly reduced after surgical decompression. Quantitative assessment of tonsillar pulsatility was more reliable across readers than qualitative assessments of tonsillar pulsatility or CSF flow.
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Affiliation(s)
- Alireza Radmanesh
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave, L-352, San Francisco, CA, 94143, USA,
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Greenberg JK, Milner E, Yarbrough CK, Lipsey K, Piccirillo JF, Smyth MD, Park TS, Limbrick DD. Outcome methods used in clinical studies of Chiari malformation Type I: a systematic review. J Neurosurg 2014; 122:262-72. [PMID: 25380104 DOI: 10.3171/2014.9.jns14406] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT Chiari malformation Type I (CM-I) is a common and often debilitating neurological disease. Efforts to improve treatment of CM-I are impeded by inconsistent and limited methods of evaluating clinical outcomes. To understand current approaches and lay a foundation for future research, the authors conducted a systematic review of the methods used in original published research articles to evaluate clinical outcomes in patients treated for CM-I. METHODS The authors searched PubMed, Embase, the Cumulative Index to Nursing and Allied Health Literature, ClinicalTrials.gov , and Cochrane databases to identify publications between January 2003 and August 2013 that met the following criteria: 1) reported clinical outcomes in patients treated for CM-I; 2) were original research articles; 3) included at least 10 patients or, if a comparative study, at least 5 patients per group; and 4) were restricted to patients with CM-I. RESULTS Among the 74 papers meeting inclusion criteria, there was wide variation in the outcome methods used. However, all approaches were broadly grouped into 3 categories: 1) "gestalt" impression of overall symptomatic improvement (n=45 papers); 2) postoperative change in specific signs or symptoms (n=20); or 3) results of various standardized assessment scales (n=22). Among standardized scales, 11 general function measures were used, compared with 6 disease-specific tools. Only 3 papers used scales validated in patients with CM-I. To facilitate a uniform comparison of these heterogeneous approaches, the authors appraised articles in multiple domains defined a priori as integral to reporting clinical outcomes in CM-I. Notably, only 7 articles incorporated patient-response instruments when reporting outcome, and only 22 articles explicitly assessed quality of life. CONCLUSIONS The methods used to evaluate clinical outcomes in CM-I are inconsistent and frequently not comparable, complicating efforts to analyze results across studies. Development, validation, and incorporation of a small number of disease-specific patient-based instruments will improve the quality of research and care of CM-I patients.
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Lee A, Yarbrough CK, Greenberg JK, Barber J, Limbrick DD, Smyth MD. Comparison of posterior fossa decompression with or without duraplasty in children with Type I Chiari malformation. Childs Nerv Syst 2014; 30:1419-24. [PMID: 24777296 PMCID: PMC4104143 DOI: 10.1007/s00381-014-2424-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 02/06/2023]
Abstract
PURPOSE Chiari malformation type I (CM1) is a common and often debilitating neurosurgical disease. Whether to treat CM1 patients with a traditional posterior fossa decompression with duraplasty (PFDD) or a less invasive extradural decompression (PFDO) is controversial. The purpose of this study was to compare clinical outcome and syrinx resolution between the two procedures. METHODS We retrospectively reviewed the records of 36 patients treated with PFDD and 29 patients with PFDO between 2003 and 2011. We compared baseline demographic, clinical, and radiographic characteristics. The primary clinical outcome was the Chicago Chiari Outcome Scale (CCOS). The primary radiographic outcome was qualitative syrinx improvement or resolution. RESULTS At baseline, age and sex distributions, radiographic characteristics, and presenting symptoms were similar in patients undergoing PFDD and PFDO. Patients undergoing PFDO had shorter surgical time (1.5 vs. 2.8 h; p < 0.001) and length of hospital stay (2.1 days compared to 3.3 days; p < 0.001). Cerebrospinal fluid-related complications were more common in patients receiving PFDD (7/36) than PFDO (0/29) (p = 0.014). Clinical improvement, defined by the mean CCOS score, was comparable in patients receiving PFDO (14.7) and PFDD (14.6) (p = 0.70). Among patients with postoperative syrinx imaging, 10/13 in the PFDD group improved or resolved, compared to 8/8 in the PFDO group (p = 0.26). CONCLUSIONS Extradural decompression for CM1 produces comparable rates of clinical and radiographic improvement as the more invasive decompression with duraplasty. Given the increased morbidity and resource utilization associated with PFDD, PFDO should be considered an attractive first-line option for most CM1 patients.
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Affiliation(s)
- Amy Lee
- Department of Neurological Surgery, University of Washington School of Medicine, Seattle Children's Hospital, Seattle, WA, USA,
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