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Lu VM, Shimony N, Jallo GI, Niazi TN. Infant Hydrocephalus. Pediatr Rev 2024; 45:450-460. [PMID: 39085190 DOI: 10.1542/pir.2023-006318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/06/2024] [Accepted: 03/15/2024] [Indexed: 08/02/2024]
Abstract
Hydrocephalus is a neurosurgical condition that is highly prevalent in pediatric medicine. In the infant population, there is a distinct set of features that all primary pediatricians would benefit from understanding. Infant hydrocephalus can present prenatally on imaging and postnatally with symptomatic enlargement of the head and associated skull features and raised intracranial pressures. The 2 major pathophysiology models of infant hydrocephalus are the bulk flow and the intracranial pulsatility models. The most common acquired forms of hydrocephalus include posthemorrhagic hydrocephalus, postinfectious hydrocephalus, and brain tumor. The most common congenital forms of hydrocephalus include those due to myelomeningocele, aqueductal stenosis, and posterior fossa malformations. There are various evaluation and treatment algorithms for these different types of hydrocephalus, including cerebrospinal fluid shunting and endoscopic third ventriculostomy. The aim of this review was to elaborate on those features of hydrocephalus to best equip primary pediatricians to diagnose and manage hydrocephalus in infants.
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Affiliation(s)
- Victor M Lu
- Department of Neurological Surgery, University of Miami, Jackson Memorial Hospital, Miami, FL
- Department of Neurological Surgery, Nicklaus Children's Hospital, Miami, FL
| | - Nir Shimony
- Department of Surgery, St Jude Children's Research Hospital, Le Bonheur Neuroscience Institute, University of Tennessee, Memphis, TN
| | - George I Jallo
- Institute for Brain Protection Sciences, Johns Hopkins All Children's Hospital, St Petersburg, FL
| | - Toba N Niazi
- Department of Neurological Surgery, University of Miami, Jackson Memorial Hospital, Miami, FL
- Department of Neurological Surgery, Nicklaus Children's Hospital, Miami, FL
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2
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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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Kozel OA, Shao B, Doberstein CA, Amaral-Nieves N, Anderson MN, Harappanahally GV, Langue MA, Svokos KA. A child with unilateral abducens nerve palsy and neurovascular compression in Chiari malformation type 1 resolved with posterior fossa decompression: illustrative case. JOURNAL OF NEUROSURGERY. CASE LESSONS 2024; 7:CASE23539. [PMID: 38710112 PMCID: PMC11076404 DOI: 10.3171/case23539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 01/16/2024] [Indexed: 05/08/2024]
Abstract
BACKGROUND Unilateral cranial nerve (CN) VI, or abducens nerve, palsy is rare in children and has not been reported in association with Chiari malformation type 1 (CM1) in the absence of other classic CM1 symptoms. OBSERVATIONS A 3-year-old male presented with acute incomitant esotropia consistent with a unilateral, left CN VI palsy and no additional neurological symptoms. Imaging demonstrated CM1 without hydrocephalus or papilledema, as well as an anterior inferior cerebellar artery (AICA) vessel loop in the immediate vicinity of the left abducens nerve. Given the high risk of a skull base approach for direct microvascular decompression of the abducens nerve and the absence of other classic Chiari symptoms, the patient was initially observed. However, as his palsy progressed, he underwent posterior fossa decompression with duraplasty (PFDD), with the aim of restoring global cerebrospinal fluid dynamics and decreasing possible AICA compression of the left abducens nerve. Postoperatively, his symptoms completely resolved. LESSONS In this first reported case of CM1 presenting as a unilateral abducens palsy in a young child, possibly caused by neurovascular compression, the patient's symptoms resolved after indirect surgical decompression via PFDD.
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Affiliation(s)
- Olivia A Kozel
- 1Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island
| | - Belinda Shao
- 1Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island
| | - Cody A Doberstein
- 1Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island
| | - Natalie Amaral-Nieves
- 1Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island
| | - Matthew N Anderson
- 4Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington
| | | | - Michael A Langue
- 3Pediatric Ophthalmology, Hasbro Children's Hospital, Providence, Rhode Island; and
| | - Konstantina A Svokos
- 1Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, Rhode Island
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4
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Esquivel MFD, Gupta N, O'Brien CA, Bijelić V, Barrowman N, Wilson N, Tu A. Natural history of Chiari I malformation with syrinx and dilatation of the central canal in the pediatric population: the CHEO experience. Childs Nerv Syst 2024; 40:1443-1448. [PMID: 38214745 DOI: 10.1007/s00381-023-06273-9] [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: 08/24/2023] [Accepted: 12/27/2023] [Indexed: 01/13/2024]
Abstract
PURPOSE Given that syrinx is often considered an indication of surgery in children with Chiari I malformation (CM1), understanding of the natural history of these patients is very challenging. In this study, we investigate the natural history of children with CM1 that have syrinx and/or prominence of the central canal on presentation. METHODS All pediatric Chiari I patients who had syrinx and/or prominence of the central canal who underwent MR imaging of the head and spine from 2007 to 2020 were reviewed. Patients were divided into 3 groups (early surgery, delayed surgery, and conservative management). We focused on those patients who did not initially undergo surgery and had at least 1 year of clinical follow-up. We assessed if there were any radiological features that would correlate with need for delayed surgical intervention. RESULTS Thirty-seven patients met the inclusion criteria. Twenty-one patients were female and 16 were male. The mean age at presentation was 8.7 (5.8 SD). Fourteen (38%) patients had early surgical intervention, with a mean of 2.5 months after initial presentation, 8 (16%) had delayed surgery due to new or progressive neurological symptoms and 46% of patients did not require intervention during follow-up. The length of tonsillar herniation and the position of the obex were associated with the need of surgery in patients who were initially treated conservatively. CONCLUSION In pediatric patients with CM1 with syringomyelia and prominence of the central canal, conservative treatment is initially appropriate when symptoms are absent or mild. Close follow-up of patients with CM1 and dilatation of the central canal who have an obex position below the foramen magnum and greater tonsillar herniation is suggested, as these patients show a trend towards clinical deterioration over time and may require earlier surgical intervention.
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Affiliation(s)
| | - Neetika Gupta
- Department of Medical Imaging, CHEO, University of Ottawa, Ottawa, ON, Canada
| | | | - Vid Bijelić
- CHEO Research Institute, CHEO, University of Ottawa, Ottawa, ON, Canada
| | - Nick Barrowman
- CHEO Research Institute, CHEO, University of Ottawa, Ottawa, ON, Canada
| | - Nagwa Wilson
- Department of Medical Imaging, CHEO, University of Ottawa, Ottawa, ON, Canada
| | - Albert Tu
- Department of Neurosurgery, CHEO, University of Ottawa, Ottawa, ON, Canada
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5
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Kirjavainen T, Miraftabi P, Martelius L, Karppinen A. Type one chiari malformation as a cause of central sleep apnea and hypoventilation in children. Sleep Med 2024; 116:32-40. [PMID: 38417306 DOI: 10.1016/j.sleep.2024.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 12/31/2023] [Accepted: 02/07/2024] [Indexed: 03/01/2024]
Abstract
OBJECTIVES Chiari type 1 malformation (CM1) may occasionally lead to central sleep apnea (CSA). We studied, in a large clinical cohort of pediatric CM1 patients, the effect of CM1 on breathing during sleep. METHODS This is a retrospective single pediatric pulmonology center study with a systematic evaluation of pediatric CM1 patients under age 18 with polysomnography (PSG) during 2008-2020. Children with syndromes were excluded. All patients had undergone head and spine magnetic resonance imaging. RESULTS We included 104 children with CM1 with a median age of 7 (interquartile range (IQR) 5-13) years. The median extent of tonsillar descent (TD) was 13 (IQR 10-18) mm. Syringomyelia was present in 19 children (18%). Of all children, 53 (51%) had normal PSG, 35 (34%) showed periodic breathing or central apnea and hypopnea index ≥5 h-1, and 16 (15%) displayed features of compensated central hypoventilation and end-tidal or transcutaneous carbon dioxide 99th percentile level above 50 mmHg. TD had the best predictive value for central breathing disorders. In a linear model, both age (61%) and TD (39%) predicted median breathing frequency (R = 0.33, p < 0.001). CONCLUSIONS Although severe CSA is a rare complication of brainstem compression in pediatric patients with CM1, short arousal-triggered episodes of periodic breathing and mild compensated central hypoventilation are common. TD shows the best but still poor prediction of the presence of a central breathing disorder. This highlights the use of PSG in patient evaluation. Posterior fossa decompression surgery effectively treats central breathing disorders.
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Affiliation(s)
- Turkka Kirjavainen
- Department of Pediatrics, New Children's Hospital, Helsinki, Finland; Department of Clinical Neurophysiology and Neurological Sciences, New Children's Hospital, Helsinki, Finland.
| | - Päriä Miraftabi
- HUS Medical Imaging Center, Radiology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Laura Martelius
- HUS Medical Imaging Center, Radiology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Atte Karppinen
- Department of Neurosurgery, New Children's Hospital, University of Helsinki and Helsinki University Hospital, Finland
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Villeneuve LM, Evans AR, Bowen I, Gernsback J, Balsara K, Jea A, Desai VR. A systematic review of the power of standardization in pediatric neurosurgery. Neurosurg Rev 2023; 46:325. [PMID: 38049561 DOI: 10.1007/s10143-023-02218-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/30/2023] [Accepted: 11/12/2023] [Indexed: 12/06/2023]
Abstract
In the current neurosurgical field, there is a constant emphasis on providing the best care with the most value. Such work requires the constant optimization of not only surgical but also perioperative services. Recent work has demonstrated the power of standardized techniques in limiting complication while promoting optimal outcomes. In this review article, protocols addressing operative and perioperative care for common pediatric neurosurgical procedures are discussed. These articles address how various institutions have optimized procedures through standardization. Our objective is to improve patient outcomes through the optimization of protocols.
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Affiliation(s)
- Lance M Villeneuve
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA.
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA.
| | - Alexander R Evans
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA
| | - Ira Bowen
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA
| | - Joanna Gernsback
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA
| | - Karl Balsara
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA
| | - Andrew Jea
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA
| | - Virendra R Desai
- Department of Neurological Surgery, University of Oklahoma College of Medicine, 1000 N Lincoln Blvd, #4000, Oklahoma City, OK, 73104, USA
- Department of Pediatric Neurosurgery, Oklahoma Children's Hospital, Oklahoma City, OK, USA
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Toader C, Ples H, Covache-Busuioc RA, Costin HP, Bratu BG, Dumitrascu DI, Glavan LA, Ciurea AV. Decoding Chiari Malformation and Syringomyelia: From Epidemiology and Genetics to Advanced Diagnosis and Management Strategies. Brain Sci 2023; 13:1658. [PMID: 38137106 PMCID: PMC10741770 DOI: 10.3390/brainsci13121658] [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: 11/06/2023] [Accepted: 11/24/2023] [Indexed: 12/24/2023] Open
Abstract
Chiari Malformation and Syringomyelia are neurosurgical entities that have been the subject of extensive research and clinical interest. Globally prevalent, these disorders vary demographically and have witnessed evolving temporal trends. Chiari Malformation impacts the normal cerebrospinal fluid flow, consequently affecting overall health. Key observations from canine studies offer pivotal insights into the pathogenesis of Syringomyelia and its extrapolation to human manifestations. Genetics plays a pivotal role; contemporary knowledge identifies specific genes, illuminating avenues for future exploration. Clinically, these disorders present distinct phenotypes. Diagnostically, while traditional methods have stood the test of time, innovative neurophysiological techniques are revolutionizing early detection and management. Neuroradiology, a cornerstone in diagnosis, follows defined criteria. Advanced imaging techniques are amplifying diagnostic precision. In therapeutic realms, surgery remains primary. For Chiari 1 Malformation, surgical outcomes vary based on the presence of Syringomyelia. Isolated Syringomyelia demands a unique surgical approach, the effectiveness of which is continually being optimized. Post-operative long-term prognosis and quality of life measures are crucial in assessing intervention success. In conclusion, this review amalgamates existing knowledge, paving the way for future research and enhanced clinical strategies in the management of Chiari Malformation and Syringomyelia.
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Affiliation(s)
- Corneliu Toader
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
- Department of Vascular Neurosurgery, National Institute of Neurology and Neurovascular Diseases, 077160 Bucharest, Romania
| | - Horia Ples
- Department of Neurosurgery, Centre for Cognitive Research in Neuropsychiatric Pathology 6 (NeuroPsy-Cog), 300736 Timișoara, Romania
- Department of Neurosurgery, “Victor Babeș” University of Medicine and Pharmacy, 300041 Timișoara, Romania
| | - Razvan-Adrian Covache-Busuioc
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
| | - Horia Petre Costin
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
| | - Bogdan-Gabriel Bratu
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
| | - David-Ioan Dumitrascu
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
| | - Luca Andrei Glavan
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
| | - Alexandru Vlad Ciurea
- Department of Neurosurgery, “Carol Davila” University of Medicine and Pharmacy, 020021 Bucharest, Romania; (C.T.); (R.-A.C.-B.); (H.P.C.); (B.-G.B.); (D.-I.D.); (L.A.G.); (A.V.C.)
- Neurosurgery Department, Sanador Clinical Hospital, 010991 Bucharest, Romania
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He Y, Zhang M, Qin X, Huang C, Liu P, Tao Y, Wang Y, Guo L, Bao M, Li H, Mao Z, Li N, He Z, Wu B. Research process, recap, and prediction of Chiari malformation based on bicentennial history of nomenclature and terms misuse. Neurosurg Rev 2023; 46:316. [PMID: 38030943 DOI: 10.1007/s10143-023-02207-w] [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: 05/16/2023] [Revised: 10/15/2023] [Accepted: 10/29/2023] [Indexed: 12/01/2023]
Abstract
There is an absent systematic analysis or review that has been conducted to clarify the topic of nomenclature history and terms misuse about Chiari malformations (CMs). We reviewed all reports on terms coined for CMs for rational use and provided their etymology and future development. All literature on the nomenclature of CMs was retrieved and extracted into core terms. Subsequently, keyword analysis, preceding and predicting (2023-2025) compound annual growth rate (CAGR) of each core term, was calculated using a mathematical formula and autoregressive integrated moving average model in Python. Totally 64,527 CM term usage was identified. Of these, 57 original terms were collected and then extracted into 24 core-terms. Seventeen terms have their own featured author keywords, while seven terms are homologous. The preceding CAGR of 24 terms showed significant growth in use for 18 terms, while 13, three, three, and five terms may show sustained growth, remain stable, decline, and rare in usage, respectively, in the future. Previously, owing to intricate nomenclature, Chiari terms were frequently misused, and numerous seemingly novel but worthless even improper terms have emerged. For a very basic neuropathological phenomenon tonsillar herniation by multiple etiology, a mechanism-based nosology seems to be more conducive to future communication than an umbrella eponym. However, a good nomenclature also should encapsulate all characteristics of this condition, but this is lacking in current CM research, as the pathophysiological mechanisms are not elucidated for the majority of CMs.
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Affiliation(s)
- Yunsen He
- Department of Neurosurgery, Sichuan Lansheng Brain Hospital & Shanghai Lansheng Brain Hospital Investment Co., Ltd., 6 Anrong Road, Chadianzi Street, Jinniu District, Chengdu, 610036, Sichuan, China
| | - Mengjun Zhang
- Department of Neuropsychology, Sichuan Provincial Center for Mental Health, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Xiaohong Qin
- Department of Neuropsychology, Sichuan Provincial Center for Mental Health, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Caiquan Huang
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China
| | - Ping Liu
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China
| | - Ye Tao
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China
| | - Yishuang Wang
- Department of Radiology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Lili Guo
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China
| | - Mingbin Bao
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China
| | - Hongliang Li
- Department of Neurosurgery, Sichuan Lansheng Brain Hospital & Shanghai Lansheng Brain Hospital Investment Co., Ltd., 6 Anrong Road, Chadianzi Street, Jinniu District, Chengdu, 610036, Sichuan, China
| | - Zhenzhen Mao
- Emergency Department, Sichuan Taikang Hospital, Chengdu, 610000, Sichuan, China
| | - Nanxiang Li
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China
| | - Zongze He
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China.
| | - Bo Wu
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, No.32, West Section 2, First Ring Road, Chengdu, 610072, Sichuan, China.
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9
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Pattisapu JV, Ackerman LL, Infinger LK, Maher CO, Quinsey C, Rocque BG, Silberstein H, Jackson EM, Jernigan S, Niazi T, Qaiser R, Raskin JS, Vachhrajani S, Bauer DF. Congress of Neurological Surgeons Systematic Review and Evidence-Based Guidelines for Patients With Chiari Malformation: Surgical Interventions. Neurosurgery 2023; 93:731-735. [PMID: 37646504 DOI: 10.1227/neu.0000000000002635] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Chiari malformation type I (CIM) diagnoses have increased in recent years. Controversy regarding the best operative management prompted a review of the literature to offer guidance on surgical interventions. OBJECTIVE To assess the literature to determine (1) whether posterior fossa decompression or posterior fossa decompression with duraplasty is more effective in preoperative symptom resolution; (2) whether there is benefit from cerebellar tonsillar resection/reduction; (3) the role of intraoperative neuromonitoring; (4) in patients with a syrinx, how long should a syrinx be observed for improvement before additional surgery is performed; and 5) what is the optimal duration of follow-up care after preoperative symptom resolution. METHODS A systematic review was performed using the National Library of Medicine/PubMed and Embase databases for studies on CIM in children and adults. The most appropriate surgical interventions, the use of neuromonitoring, and clinical improvement during follow-up were reviewed for studies published between 1946 and January 23, 2021. RESULTS A total of 80 studies met inclusion criteria. Posterior fossa decompression with or without duraplasty or cerebellar tonsil reduction all appeared to show some benefit for symptom relief and syrinx reduction. There was insufficient evidence to determine whether duraplasty or cerebellar tonsil reduction was needed for specific patient groups. There was no strong correlation between symptom relief and syringomyelia resolution. Many surgeons follow patients for 6-12 months before considering reoperation for persistent syringomyelia. No benefit or harm was seen with the use of neuromonitoring. CONCLUSION This evidence-based clinical guidelines for the treatment of CIM provide 1 Class II and 4 Class III recommendations. In patients with CIM with or without syringomyelia, treatment options include bone decompression with or without duraplasty or cerebellar tonsil reduction. Improved syrinx resolution may potentially be seen with dural patch grafting. Symptom resolution and syrinx resolution did not correlate directly. Reoperation for a persistent syrinx was potentially beneficial if the syrinx had not improved 6 to 12 months after the initial operation. The full guidelines can be seen online at https://www.cns.org/guidelines/browse-guidelines-detail/3-surgical-interventions .
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Affiliation(s)
- Jogi V Pattisapu
- Pediatric Neurosurgery, University of Central Florida College of Medicine, Orlando , Florida , USA
| | - Laurie L Ackerman
- Department of Neurological Surgery, Indiana University Health, Indianapolis , Indiana , USA
| | - Libby Kosnik Infinger
- Department of Neurosurgery, Medical University of South Carolina (MUSC), Charleston , South Carolina , USA
| | - Cormac O Maher
- Department of Neurosurgery, Stanford Medicine, Palo Alto , California , USA
| | - Carolyn Quinsey
- Department of Neurosurgery, University of North Carolina Chapel Hill, Chapel Hill , North Carolina , USA
| | - Brandon G Rocque
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Alabama at Birmingham, Birmingham , Alabama , USA
| | - Howard Silberstein
- Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester , New York , USA
| | - Eric M Jackson
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore , Maryland , USA
| | - Sarah Jernigan
- Carolina Neurosurgery & Spine Associates, Charlotte , North Carolina , USA
| | - Toba Niazi
- Department of Neurological Surgery, Nicklaus Children's Hospital, Miami , Florida , USA
| | - Rabia Qaiser
- Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis , Indiana , USA
| | - Jeffrey S Raskin
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago , Illinois , USA
| | - Shobhan Vachhrajani
- Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton , Ohio , USA
| | - David F Bauer
- Department of Neurosurgery, Baylor College of Medicine, Houston , Texas , USA
- Division of Pediatric Neurosurgery, Texas Children's Hospital, Houston , Texas , USA
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Jackson EM, Jernigan S, Raskin JS, Ackerman LL, Infinger LK, Maher CO, Niazi T, Pattisapu JV, Qaiser R, Quinsey C, Rocque BG, Silberstein H, Vachhrajani S, Bauer DF. Congress of Neurological Surgeons Systematic Review and Evidence-Based Guidelines for Patients With Chiari Malformation: Symptoms. Neurosurgery 2023; 93:727-730. [PMID: 37646519 DOI: 10.1227/neu.0000000000002634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Chiari I malformation (CIM) is characterized by descent of the cerebellar tonsils through the foramen magnum, potentially causing symptoms from compression or obstruction of the flow of cerebrospinal fluid. Diagnosis and treatment of CIM is varied, and guidelines produced through systematic review may be helpful for clinicians. OBJECTIVE To perform a systematic review of the medical literature to answer specific questions on the diagnosis and treatment of CIM. METHODS PubMed and Embase were queried between 1946 and January 23, 2021, using the search strategies provided in Appendix I of the full guidelines. RESULTS The literature search yielded 430 abstracts, of which 79 were selected for full-text review, 44 were then rejected for not meeting the inclusion criteria or for being off-topic, and 35 were included in this systematic review. CONCLUSION Four Grade C recommendations were made based on Class III evidence, and 1 question had insufficient evidence. The full guidelines can be seen online at https://www.cns.org/guidelines/browse-guidelines-detail/2-symptoms .
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Affiliation(s)
- Eric M Jackson
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore , Maryland , USA
| | - Sarah Jernigan
- Carolina Neurosurgery & Spine Associates, Charlotte , North Carolina , USA
| | - Jeffrey S Raskin
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago , Illinois , USA
| | - Laurie L Ackerman
- Department of Neurological Surgery, Indiana University Health, Indianapolis , Indiana , USA
| | - Libby Kosnik Infinger
- Department of Neurosurgery, Medical University of South Carolina (MUSC), Charleston , South Carolina , USA
| | - Cormac O Maher
- Department of Neurosurgery, Stanford Medicine, Palo Alto , California , USA
| | - Toba Niazi
- Department of Neurological Surgery, Nicklaus Children's Hospital, Miami , Florida , USA
| | - Jogi V Pattisapu
- Pediatric Neurosurgery, University of Central Florida College of Medicine, Orlando , Florida , USA
| | - Rabia Qaiser
- Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis , Indiana , USA
| | - Carolyn Quinsey
- Department of Neurosurgery, University of North Carolina Chapel Hill, Chapel Hill , North Carolina , USA
| | - Brandon G Rocque
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Alabama at Birmingham, Birmingham , Alabama , USA
| | - Howard Silberstein
- Department of Neurosurgery, University of Rochester School of Medicine and Dentistry, Rochester , New York , USA
| | - Shobhan Vachhrajani
- Department of Pediatrics, Wright State University Boonshoft School of Medicine, Dayton , Ohio , USA
| | - David F Bauer
- Department of Neurosurgery, Baylor College of Medicine, Houston , Texas , USA
- Division of Pediatric Neurosurgery, Texas Children's Hospital, Houston , Texas , USA
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11
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Wieland CM, Holste KG, Selzer B, Garton HJL, Muraszko KM, Maher CO. Sports Participation and Neurological Injuries in Pediatric Patients With Chiari I Malformation. Neurosurgery 2023; 93:646-653. [PMID: 36961215 DOI: 10.1227/neu.0000000000002468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 01/30/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND Currently, there is no consensus recommendation regarding the safety of sports participation for pediatric patients with Chiari I malformation (CM-I). OBJECTIVE To prospectively survey the treated and untreated patients with CM-I to define the risk of sports-associated neurological injury. METHODS A prospective survey was administered to 744 pediatric patients at one neurosurgery clinic between 2010 and 2021. Data were recorded on demographic information, imaging characteristics, treatment, sports participation, and presence of sports-related neurological injury. Patients with incomplete data were called. Two hundred seven patients completed at least 1 subsequent survey and were prospectively followed (mean 1.6 years). RESULTS Of 744 patients with completed surveys, 462 participated in sports. Sports participants were more likely to be older at presentation ( P < .001) and have rounded cerebellar tonsil morphology ( P < .001). Seasons of sports played before and after CM-I decompression (CMD) totaled 5918.7 and 936, respectively. There were 84 sports-related concussions among 55 patients; 79 in untreated patients and 5 after CMD. For all sports participants, the concussion rate was 12.3/1000 seasons of all sports, 9.2/1000 seasons of limited-contact sports, and 13.8/1000 of contact sports. The concussion rate after CMD was 5.3/1000 seasons of all sports, 9.2/1000 seasons of limited-contact sports, and 7.1/1000 seasons of contact sports. There were no reports of long-lasting neurological issues postconcussion or of permanent spinal cord injury. CONCLUSION No permanent or catastrophic sports-associated neurological injuries were reported. The concussion rates in treated and untreated patients with CM-I were low. Therefore, sports participation in this population should be permitted in most cases.
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Affiliation(s)
- Clare M Wieland
- School of Medicine, University of Michigan, Ann Arbor , Michigan , USA
| | - Katherine G Holste
- Department of Neurosurgery, University of Michigan, Ann Arbor , Michigan , USA
| | - Bela Selzer
- Department of Neurosurgery, University of Michigan, Ann Arbor , Michigan , USA
| | - Hugh J L Garton
- Department of Neurosurgery, University of Michigan, Ann Arbor , Michigan , USA
| | - Karin M Muraszko
- Department of Neurosurgery, University of Michigan, Ann Arbor , Michigan , USA
| | - Cormac O Maher
- Department of Neurosurgery, University of Michigan, Ann Arbor , Michigan , USA
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12
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Tanaka M, Sharma S, Fujiwara Y, Arataki S, Omori T, Kanamaru A, Kodama Y, Saad H, Yamauchi T. Accurate Posterior Fossa Decompression Technique for Chiari Malformation Type I and a Syringomyelia With Navigation: A Technical Note. Int J Spine Surg 2023; 17:615-622. [PMID: 37460242 PMCID: PMC10478704 DOI: 10.14444/8483] [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: 08/27/2023] Open
Abstract
BACKGROUND Posterior fossa decompression (PFD) has been widely accepted for the surgical treatment for Chiari malformation type I (CM1). However, inadequate decompression causes surgical mortality and complications such as cerebrospinal fluid leakage, meningitis, or progression of syrinx and symptoms. The authors report a novel technique of PFD under navigation. METHODS Five female patients with CM1 who developed severe symptoms and underwent surgical treatment were evaluated (mean age 14.0 years; mean follow-up 1.3 years). Surgical outcomes, surgical time, intraoperative blood loss, and operative complications were assessed. RESULTS Four patients with CM1 who developed severe symptoms and underwent surgery were evaluated (mean age 14 years; mean follow-up 1.2 years). All patients were treated with PFD, C1 (and partial C2) laminoplasty to decompress the spinal cord under navigation guidance. Suboccipital craniectomy with 3 cm in diameter around the foramen magnum was performed. The postoperative radiograms and computed tomographic images showed adequate bony resection for CM1. Average surgical time was 114 minutes and average blood loss was 82 mL. There were no postoperative complications. After surgery, the numbness and muscle weakness of the patients were improved. The final follow-up magnetic resonance imaging displayed a good decompression of cerebral tonsile, and cervical syringomyelia was decreased. CONCLUSIONS PFD under navigation guidance can reduce inappropriate decompression and may decrease a revision surgery. During decompression surgery, cerebrospinal fluid leakage can be prevented using an ultrasonic bone cutter and navigation. LEVEL OF EVIDENCE: 5
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Affiliation(s)
- Masato Tanaka
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Sneha Sharma
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Yoshihiro Fujiwara
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Shinya Arataki
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Toshinori Omori
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Akihiro Kanamaru
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Yuya Kodama
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Hossam Saad
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
| | - Taro Yamauchi
- Department of Orthopedic Surgery, Okayama Rosai Hospital, Okayama, Japan
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13
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Eisenberg L, Gienapp AJ, Eisenberg A, Arnautovic KI. Effect of Body Mass Index on Chiari Malformation 1 Tonsil Ectopia Length in Adults. World Neurosurg 2023; 176:e380-e383. [PMID: 37236309 DOI: 10.1016/j.wneu.2023.05.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/14/2023] [Indexed: 05/28/2023]
Abstract
OBJECTIVE Diagnosis of Chiari I malformation (CM-1) is based on measurements of the inferior extension of the cerebellar tonsils into the foramen magnum on cranial or cervical spine magnetic resonance imaging. Imaging may be obtained before the patient is referred to the neurosurgical specialist. The length of time raises questions about the possibility that body mass index (BMI) fluctuations could affect the measurement of ectopia length. However, previous literature on BMI and CM-1 has reported conflicting findings on BMI. METHODS We conducted a retrospective chart review of 161 patients who were referred to a single neurosurgeon for CM-1 consultation. Patients with multiple recorded BMI values (n = 71) were compared to see if BMI changes correlated with changes in ectopia length. In addition, we compared and tested 154 recorded ectopia lengths from the patients (1 per patient) and patient BMI values with Pearson correlation and Welch t tests to determine if BMI changes either influenced or were associated with ectopia changes. RESULTS For the 71 patients with multiple BMI values, change in ectopia length ranged from -4.6-9.8 mm but was not statistically significant (r = 0.019; P = 0.88). For the 154 measured ectopia lengths, changes in BMI did not correlate with ectopia length (P > 0.05). Likewise, differences in ectopia length between patients in normal, overweight, and obese categories were not statistically significant (|tstat| < |tcrit|, P > 0.05). CONCLUSIONS In individual patients, we found that BMI and changes in BMI were not accompanied by changes in tonsil ectopia length.
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Affiliation(s)
| | - Andrew J Gienapp
- Department of Neurosurgery, The University of Tennessee Health Science Center, Memphis, Tennessee, USA; Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | | | - Kenan I Arnautovic
- Semmes-Murphy Clinic, Memphis, Tennessee, USA; Department of Neurosurgery, The University of Tennessee Health Science Center, Memphis, Tennessee, USA.
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14
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Eisenberg L, Eisenberg A, Gienapp AJ, Arnautovic K. Cranial Versus Cervical Spine Magnetic Resonance Imaging in Adult Chiari Malformation Type I Diagnostics: Is There a Difference in Tonsil Ectopia Length? World Neurosurg 2023; 175:e243-e246. [PMID: 36940808 DOI: 10.1016/j.wneu.2023.03.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/13/2023] [Accepted: 03/14/2023] [Indexed: 03/23/2023]
Abstract
BACKGROUND Chiari malformation type 1 (CM-1) diagnosis is based on measurement of the cerebellar tonsils on cranial or cervical spine magnetic resonance imaging (MRI). However, imaging parameters of cranial and cervical spine MRI could differ because spine MRI has greater resolution. METHODS We conducted a retrospective chart review of 161 patients of a single neurosurgeon for adult CM-I consultation between February 2006 and March 2019. Patients were selected based on receiving both cranial and cervical spine MRI within a month of each other to determine tonsillar ectopia length for CM-1. Ectopias were measured to determine if differences in values were statistically significant. RESULTS From the 161 total patients, 81 had cranial and cervical spine MRI for a total of 162 tonsil ectopia measurements (81 cranial and 81 spinal). Average ectopia length on a cranial MRI was 9.1 mm (±5.2 mm); average ectopia length on a spinal MRI was 8.9 mm (±5.3 mm). Average cranial and spinal MRI values were found to be <1 standard deviation apart. Two-tailed, nonequal variances t test determined that differences between the cranial and spinal ectopia measurements were insignificant (P = 0.2403). CONCLUSIONS This study confirmed that the added resolution offered by spine MRI did not make better or more refined measurements over cranial MRI that could lead to measurement differences, which can instead be attributed to chance. Cranial and cervical spine MRI can be used to determine the degree of the tonsil ectopia.
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Affiliation(s)
| | | | - Andrew J Gienapp
- Department of Neurosurgery, The University of Tennessee Health Science Center, Memphis, Tennessee, USA; Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Kenan Arnautovic
- Semmes-Murphy Clinic, Memphis, Tennessee, USA; Department of Neurosurgery, The University of Tennessee Health Science Center, Memphis, Tennessee, USA.
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15
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Atallah O, Wolff Fernandes F, Krauss JK. The Chiari Malformations: A Bibliometric Analysis of the 100 Most Cited Articles. World Neurosurg 2023; 175:e754-e768. [PMID: 37037368 DOI: 10.1016/j.wneu.2023.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/12/2023]
Abstract
OBJECTIVE The Chiari malformations present heterogeneous entities, raising many questions regarding their natural history, pathophysiology, treatment options, and prognosis. Bibliometric analyses have emerged as a method to assess the impact of articles in current clinical practice. METHODS The most cited articles were identified via Scopus Library by using the keywords "Chiari," "Arnold-Chiari," and "Chiari malformation." The 100 most cited articles were then assembled and analyzed in detail. RESULTS The top 100 articles yielded a mean of 155,28 citations per article, ranging from 87 to 896 citations, and from 1.63 to 38.96 per year. Years of publications ranged from 1950 to 2015. Oakes was the most cited author (n = 7), followed by Tubbs and Milhorat. The country with the highest cited articles was the United States (n = 63), followed by the United Kingdom (n = 6), Italy (n = 5), Spain (n = 5), Japan (n = 4), and Germany (n = 3). Neurosurgery is the journal with the most highly cited articles (n = 21), followed by Journal of Neurosurgery (n = 19). Most articles focused on Chiari malformation type I (n = 83). The topic discussed most often was imaging (n = 63), followed by the evaluation of treatment outcome (n = 58), clinical signs and symptoms (n = 57), and the role of surgery (n = 56). CONCLUSIONS The present bibliometric analysis provides a succinct appraisal of the most cited articles concerning Chiari malformation, allowing a deeper insight in this area and its main influential articles with their impact on current clinical practice and future research.
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Affiliation(s)
- Oday Atallah
- Department of Neurosurgery, Hannover Medical School, Hannover, Germany.
| | | | - Joachim K Krauss
- Department of Neurosurgery, Hannover Medical School, Hannover, Germany
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16
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Hauser Chatterjee J, Boos MD, Shaw DW, Ellenbogen RG, Duffy EK. Resolution of a Focal Pruritic Rash Following Neurosurgical Decompression in an Adolescent With Chiari I and Syringomyelia. Pediatr Neurol 2023; 145:115-118. [PMID: 37329859 DOI: 10.1016/j.pediatrneurol.2023.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/12/2023] [Indexed: 06/19/2023]
Affiliation(s)
- Jessica Hauser Chatterjee
- Division of Pediatric Neurology and Seattle Children's Research Institute, Department of Neurology, University of Washington School of Medicine, Seattle, Washington.
| | - Markus D Boos
- Department of Dermatology, University of Washington and Seattle Children's Hospital, Seattle, Washington
| | - Dennis W Shaw
- Department of Radiology, University of Washington, Seattle, Washington
| | - Richard G Ellenbogen
- Department of Neurological Surgery, University of Washington School of Medicine, Seattle, Washington
| | - Emily K Duffy
- Department of Dermatology, University of Washington and Seattle Children's Hospital, Seattle, Washington
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17
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Krishnan N, McMullan P, Yang Q, Buscarello AN, Germain-Lee EL. Prevalence of Chiari malformation type 1 is increased in pseudohypoparathyroidism type 1A and associated with aberrant bone development. PLoS One 2023; 18:e0280463. [PMID: 36662765 PMCID: PMC9858345 DOI: 10.1371/journal.pone.0280463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/29/2022] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Albright hereditary osteodystrophy (AHO) is caused by heterozygous inactivating mutations in GNAS. Patients with maternally-inherited mutations develop pseudohypoparathyroidism type 1A (PHP1A) with multi-hormone resistance and aberrant craniofacial and skeletal development among other abnormalities. Chiari malformation type 1 (CM1), a condition in which brain tissue extends into the spinal canal when the skull is too small, has been reported in isolated cases of PHP1A. It has been hypothesized to be associated with growth hormone (GH) deficiency. Given the adverse clinical sequelae that can occur if CM1 goes unrecognized, we investigated the previously undetermined prevalence of CM1, as well as any potential correlations with GH status, given the known increased prevalence of GH deficiency in PHP1A. We also investigated these metrics for low lying cerebellar tonsils (LLCT), defined as tonsillar descent less than 5 mm below the foramen magnum. In addition, we investigated possible correlations of CM1/LLCT with advanced hand/wrist bone ages and craniofacial abnormalities known to occur in PHP1A to determine whether premature chondrocyte differentiation and/or aberrant craniofacial development could be potential etiologies of CM1/LLCT through both human studies and investigations of our AHO mouse model. METHODS We examined patients with PHP1A in our clinic and noticed CM1 more frequently than expected. Therefore, we set out to determine the true prevalence of CM1 and LLCT in a cohort of 54 mutation-confirmed PHP1A participants who had clinically-indicated brain imaging. We examined potential correlations with GH status, clinical features, biological sex, genotype, and hand/wrist bone age determinations. In addition, we investigated the craniofacial development in our mouse model of AHO (Gnas E1+/-m) by histologic analyses, dynamic histomorphometry, and micro-computerized tomographic imaging (MCT) in order to determine potential etiologies of CM1/LLCT in PHP1A. RESULTS In our cohort of PHP1A, the prevalence of CM1 is 10.8%, which is at least 10-fold higher than in the general population. If LLCT is included, the prevalence increases to 21.7%. We found no correlation with GH status, biological sex, genotype, or hand/wrist bone age. Through investigations of our Gnas E1+/-m mice, the correlate to PHP1A, we identified a smaller cranial vault and increased cranial dome angle with evidence of hyperostosis due to increased osteogenesis. We also demonstrated that there was premature closure of the spheno-occipital synchondrosis (SOS), a cartilaginous structure essential to the development of the cranial base. These findings lead to craniofacial abnormalities and could contribute to CM1 and LLCT development in PHP1A. CONCLUSION The prevalence of CM1 is at least 10-fold higher in PHP1A compared to the general population and 20-fold higher when including LLCT. This is independent of the GH deficiency that is found in approximately two-thirds of patients with PHP1A. In light of potential serious consequences of CM1, clinicians should have a low threshold for brain imaging. Investigations of our AHO mouse model revealed aberrant cranial formation including a smaller cranium, increased cranial dome angle, hyperostosis, and premature SOS closure rates, providing a potential etiology for the increased prevalence of CM1 and LLCT in PHP1A.
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Affiliation(s)
- Neetu Krishnan
- Department of Pediatrics, Division of Pediatric Endocrinology & Diabetes, University of Connecticut School of Medicine, Farmington, Connecticut, United States of America
- Albright Center, Division of Pediatric Endocrinology & Diabetes, Connecticut Children’s, Farmington, Connecticut, United States of America
| | - Patrick McMullan
- Department of Pediatrics, Division of Pediatric Endocrinology & Diabetes, University of Connecticut School of Medicine, Farmington, Connecticut, United States of America
- Department of Reconstructive Sciences, Center for Regenerative Medicine and Skeletal Development, University of Connecticut School of Dental Medicine, Farmington, Connecticut, United States of America
| | - Qingfen Yang
- Department of Pediatrics, Division of Pediatric Endocrinology & Diabetes, University of Connecticut School of Medicine, Farmington, Connecticut, United States of America
- Department of Reconstructive Sciences, Center for Regenerative Medicine and Skeletal Development, University of Connecticut School of Dental Medicine, Farmington, Connecticut, United States of America
| | - Alexzandrea N. Buscarello
- Albright Center, Division of Pediatric Endocrinology & Diabetes, Connecticut Children’s, Farmington, Connecticut, United States of America
| | - Emily L. Germain-Lee
- Department of Pediatrics, Division of Pediatric Endocrinology & Diabetes, University of Connecticut School of Medicine, Farmington, Connecticut, United States of America
- Albright Center, Division of Pediatric Endocrinology & Diabetes, Connecticut Children’s, Farmington, Connecticut, United States of America
- Department of Reconstructive Sciences, Center for Regenerative Medicine and Skeletal Development, University of Connecticut School of Dental Medicine, Farmington, Connecticut, United States of America
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18
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Chiari I Malformation and Sleep-Disordered Breathing. Neurosurg Clin N Am 2023; 34:35-41. [DOI: 10.1016/j.nec.2022.08.005] [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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19
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Idiopathic Intracranial Hypertension and Vascular Anomalies in Chiari I Malformation. Neurosurg Clin N Am 2023; 34:175-183. [DOI: 10.1016/j.nec.2022.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Sysoev KV, Turanov SA, Kornev AP, Khodykin EA, Shapovalov AS, Kim AV, Samochernykh KA. [Results of surgical treatment of children with Chiari I malformation using differentiated intraoperative tactics of choosing the volume of intervention]. ZHURNAL VOPROSY NEIROKHIRURGII IMENI N. N. BURDENKO 2023; 87:66-73. [PMID: 37650278 DOI: 10.17116/neiro20238704166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
BACKGROUND Despite the presence of numerous publications and analytical reviews in the foreign literature, there is no universally accepted algorithm for the surgical treatment of Chiari I malformation (MC I) in children. Moreover, in the domestic literature, the number of publications devoted to the problems of surgical treatment of MC I in children is significantly limited, which, in our opinion, this is the reason for the relevance of this work. OBJECTIVE To study the results of surgical treatment of children with MC I when applying differentiated tactics of intraoperative choice of intervention volume. MATERIAL AND METHODS The results of neurological examination and surgical treatment of 43 patients aged from 1 to 17 years (mean age 8.48 years) were analyzed. The decision on the need for duraplasty was made intraoperatively when signs of persisting compression of subarachnoid spaces after extradural decompression were detected. Clinical manifestations were assessed according to neurological data before discharge, as well as in long-term period with a follow-up from 6 months to 5 years via survey. RESULTS Duraplasty was required in 28% of cases. Respiratory disorders disappeared in all patients immediately after surgery and were absent thereafter. Positive dynamics was noted in terms of restoration of the rate of speech development. Headache persisted in 7 (21%) patients, movement, sensation disorders and cerebellar symptoms - in 4 (12%), vomiting and bulbar symptoms - in 2 (6%) patients. There was no difference in the efficacy of surgery with and without duraplasty. None of the parameters evaluated preoperatively had a significant association with the intraoperative decision on the need for duraplasty. CONCLUSION In our opinion, final decision on surgical strategy in children with Chiari malformation type I should be made considering intraoperative assessment of extradural decompression. The last one is probably associated with individual characteristics of patients.
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Affiliation(s)
- K V Sysoev
- Almazov National Medical Research Center, St. Petersburg, Russia
| | - S A Turanov
- Almazov National Medical Research Center, St. Petersburg, Russia
| | - A P Kornev
- Stavropol Regional Clinical Hospital, Stavropol, Russia
| | - E A Khodykin
- Moscow City Clinical Hospital No. 13, Moscow, Russia
| | - A S Shapovalov
- Almazov National Medical Research Center, St. Petersburg, Russia
| | - A V Kim
- Almazov National Medical Research Center, St. Petersburg, Russia
| | - K A Samochernykh
- Almazov National Medical Research Center, St. Petersburg, Russia
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21
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Makoshi Z, Leonard JR. Clinical Manifestations of Chiari I Malformation. Neurosurg Clin N Am 2023; 34:25-34. [DOI: 10.1016/j.nec.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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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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23
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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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Pindrik J, McAllister AS, Jones JY. Imaging in Chiari I Malformation. Neurosurg Clin N Am 2023; 34:67-79. [DOI: 10.1016/j.nec.2022.08.006] [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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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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26
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Epidemiology of Chiari I Malformation and Syringomyelia. Neurosurg Clin N Am 2022; 34:9-15. [DOI: 10.1016/j.nec.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dien Esquivel MF, Gupta N, Wilson N, O'Brien CA, Gladkikh M, Barrowman N, Bijelić V, Tu A. Pediatric Chiari I malformation: novel and traditional measurements associated with syrinx and surgery. Childs Nerv Syst 2022; 38:2119-2128. [PMID: 35962220 DOI: 10.1007/s00381-022-05644-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 08/03/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE Multiple imaging parameters have been examined to estimate the presence of syrinx and the need for surgery in Chiari I patients (CM1); however, no consistent or definitive criteria have been proposed. The objective of this study was to review existing and identify novel radiological and clinical characteristics of CM1 patients that associate syrinx development and surgical intervention. METHODS Patients with Chiari I malformation diagnosed on imaging between 0 and 18 years were retrospectively reviewed from January 1, 2007 to February 12, 2020. Participants were included if they had a baseline MRI of the head and spine prior to surgical intervention if required. Forty age-matched controls with cranial imaging were identified for comparison. Imaging parameters and clinical symptoms were recorded. RESULTS A total of 122 CM1 patients were included in this study. Of the 122 patients, 28 (23%) had syrinx, and 27 (22%) had surgery. The following imaging parameters associated with syrinx and surgical intervention were identified: midbrain length (P < 0.001; P = 0.032), the obex position (P = 0.002; P < 0.001) and medullary kinking (P = 0.041; P < 0.001). Among the clinical features, the presence of overall pain (P = 0.017; P = 0.042), neck pain (P = 0.005; P = 0.027), and sensory dysfunction (P < 0.001) were found to be strongly associated with syrinx and surgery. CONCLUSION While further investigation is needed, these specific radiological and clinical parameters should be considered when evaluating CM1 patients and may be used to guide further management.
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Affiliation(s)
- Maria F Dien Esquivel
- University of Ottawa, Ottawa, ON, Canada. .,Department of Medical Imaging, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada.
| | - Neetika Gupta
- University of Ottawa, Ottawa, ON, Canada.,Department of Medical Imaging, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Nagwa Wilson
- University of Ottawa, Ottawa, ON, Canada.,Department of Medical Imaging, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada.,Research Institute, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Christian Alfred O'Brien
- University of Ottawa, Ottawa, ON, Canada.,Northern Ontario School of Medicine, Thunder Bay, ON, Canada
| | | | - Nick Barrowman
- Research Institute, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Vid Bijelić
- Research Institute, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Albert Tu
- University of Ottawa, Ottawa, ON, Canada.,Division of Neurosurgery, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada.,Research Institute, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
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Makoshi Z, Toop N, Smith LGF, Drapeau A, Pindrik J, Sribnick EA, Leonard J, Shaikhouni A. Association between synthetic sealants and increased complication rates in posterior fossa decompression with duraplasty for Chiari malformations regardless of graft type. J Neurosurg Pediatr 2022; 30:507-516. [PMID: 36087335 DOI: 10.3171/2022.7.peds22231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 07/26/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Dural sealants are commonly used in posterior fossa decompression with duraplasty (PFDD) for Chiari malformation type I (CMI). Prior evidence suggests that combining certain sealants with some graft material is associated with an increased rate of complications. In 2018, the authors noted an increased rate of symptomatic pseudomeningocele and aseptic meningitis after PFDD in CMI patients. The authors utilized retrospective and prospective analyses to test the hypothesis that complication rates increase with the use or combination of certain sealants and grafts. METHODS The analysis was split into 2 periods. The authors retrospectively reviewed patients who underwent PFDD for CMI at their center between August 12, 2011, and December 31, 2018. The authors then eliminated use of DuraSeal on the basis of the retrospective analysis and prospectively examined complication rates from January 1, 2019, to August 4, 2021. The authors defined a complication as symptomatic pseudomeningocele, bacterial or aseptic meningitis, cerebrospinal fluid leak, subdural hygroma, hydrocephalus, surgical site infection, or wound dehiscence. RESULTS From 2011 to 2018, complications occurred in 24.5% of 110 patients. Sealant choice was correlated with complication rates: no sealant (0%), Tisseel (6%), and DuraSeal (15.3%) (p < 0.001). No difference in complication rate was noted on the basis of choice of graft material (p = 0.844). After eliminating DuraSeal, the authors followed 40 patients who underwent PFDD after 2018. The complication rate decreased to 12.5%. All complications after 2018 were associated with Tisseel. CONCLUSIONS At the authors' single center, use of sealants in PFDD surgery for CMI, especially DuraSeal, was correlated with a higher complication rate. Eliminating DuraSeal led to a significant decrease in the rate of symptomatic pseudomeningocele and aseptic meningitis.
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Affiliation(s)
- Ziyad Makoshi
- 1Department of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus; and
| | - Nathaniel Toop
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Luke G F Smith
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Annie Drapeau
- 1Department of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus; and
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Jonathan Pindrik
- 1Department of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus; and
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Eric A Sribnick
- 1Department of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus; and
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Jeffrey Leonard
- 1Department of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus; and
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Ammar Shaikhouni
- 1Department of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus; and
- 2Department of Neurosurgery, The Ohio State University Wexner Medical Center, Columbus, Ohio
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Cools MJ, Wellons JC, Iskandar BJ. The Nomenclature of Chiari Malformations. Neurosurg Clin N Am 2022; 34:1-7. [DOI: 10.1016/j.nec.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abbas Akbari SH. Sociodemographics of Chiari I Malformation. Neurosurg Clin N Am 2022; 34:17-23. [DOI: 10.1016/j.nec.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Benzon HA, Tantoco A, Longhini A, Hajduk J, Saratsis A, Suresh S, McCarthy RJ, Jagannathan N. Patient and operative factors associated with unanticipated intensive care admission and outcomes following posterior fossa decompressions in children: A retrospective study. Paediatr Anaesth 2022; 32:937-945. [PMID: 35604044 PMCID: PMC9541405 DOI: 10.1111/pan.14496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 05/13/2022] [Accepted: 05/15/2022] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Posterior fossa decompression for Chiari I Malformation is a common pediatric neurosurgical procedure. We sought to identify the impact of anesthesia-related intraoperative complications on unanticipated admission to the intensive care unit and outcomes following posterior fossa decompression. METHODS Medical records of all patients <18 years who underwent surgery for Chiari I malformation between 1/1/09 and 1/31/21 at the Ann & Robert H. Lurie Children's Hospital of Chicago were included. Records were reviewed for patient characteristics, anesthesia-related intraoperative complications, postoperative complications, and surgical outcomes. The primary outcome was the incidence of unanticipated admission to the intensive care unit, and the primary variable of interest was an anesthesia-related intraoperative complication. Patient, surgical characteristics, and year of surgery were also compared between patients with and without an unanticipated admission to the intensive care unit, and a multi-variable adjusted estimate of odds of unanticipated admission to the intensive care unit admission following an anesthesia-related intraoperative complication was performed. Secondary outcomes included anesthesia factors associated with an anesthesia-related intraoperative event, and postoperative complications and surgical outcomes between patients admitted to the intensive care unit and those who were not. RESULTS Two hundred ninety-six patients with Chiari I Malformation were identified. Clinical characteristics associated with an unanticipated admission to the intensive care unit were younger age, American Society of Anesthesiologist (ASA) physical status >2 and an anesthesia-related intraoperative complication. 29 anesthesia-related intraoperative complications were observed in 25 patients (8.4%). Two of 25 patients (8%) with an anesthesia-related intraoperative complication compared with 3 of 271 (1%) patients without anesthesia-related intraoperative complication had an unanticipated admission to the intensive care unit, odds ratio 7.8 (95% CI 1.2-48.8, p = .010). When adjusted for age, sex, ASA physical status, presenting symptoms, concomitant syringomyelia, previous decompression surgery and year of surgery, the odds ratio for an unanticipated admission to the intensive care unit following an anesthesia-related intraoperative complication was 5.9 (95% CI 0.51-59.6, p = .149). There were no differences in surgical outcomes between patients with or without an unanticipated admission to the intensive care unit. CONCLUSION Our study demonstrates that although anesthesia-related intraoperative complications during posterior fossa decompression are infrequent, they are associated with an increased risk of an unanticipated admission to the intensive care unit.
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Affiliation(s)
- Hubert A. Benzon
- Department of Pediatric Anesthesiology, Ann & Robert H. Lurie Children's Hospital of ChicagoNorthwestern University Feinberg School of MedicineChicagoIllinoisUSA
| | - Anthony Tantoco
- Department of Pediatric Anesthesiology, Ann & Robert H. Lurie Children's Hospital of ChicagoNorthwestern University Feinberg School of MedicineChicagoIllinoisUSA
| | - Anthony Longhini
- Department of AnesthesiologyYale University School of MedicineNew HavenConnecticutUSA
| | - John Hajduk
- Department of Pediatric Anesthesiology, Ann & Robert H. Lurie Children's Hospital of ChicagoNorthwestern University Feinberg School of MedicineChicagoIllinoisUSA
| | - Amanda Saratsis
- Department of Neurological SurgeryRiley Hospital for Children, and Indiana University School of MedicineIndianapolisIndianaUSA
| | - Santhanam Suresh
- Department of Pediatric Anesthesiology, Ann & Robert H. Lurie Children's Hospital of ChicagoNorthwestern University Feinberg School of MedicineChicagoIllinoisUSA
| | | | - Narasimhan Jagannathan
- Department of Pediatric Anesthesiology, Ann & Robert H. Lurie Children's Hospital of ChicagoNorthwestern University Feinberg School of MedicineChicagoIllinoisUSA
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Akbari SHA, Yahanda AT, Ackerman LL, Adelson PD, Ahmed R, Albert GW, Aldana PR, Alden TD, Anderson RCE, Bauer DF, Bethel-Anderson T, Bierbrauer K, Brockmeyer DL, Chern JJ, Couture DE, Daniels DJ, Dlouhy BJ, Durham SR, Ellenbogen RG, Eskandari R, Fuchs HE, Grant GA, Graupman PC, Greene S, Greenfield JP, Gross NL, Guillaume DJ, Hankinson TC, Heuer GG, Iantosca M, Iskandar BJ, Jackson EM, Jallo GI, Johnston JM, Kaufman BA, Keating RF, Khan NR, Krieger MD, Leonard JR, Maher CO, Mangano FT, McComb JG, McEvoy SD, Meehan T, Menezes AH, Muhlbauer MS, O'Neill BR, Olavarria G, Ragheb J, Selden NR, Shah MN, Shannon CN, Shimony JS, Smyth MD, Stone SSD, Strahle JM, Tamber MS, Torner JC, Tuite GF, Tyler-Kabara EC, Wait SD, Wellons JC, Whitehead WE, Park TS, Limbrick DD. Complications and outcomes of posterior fossa decompression with duraplasty versus without duraplasty for pediatric patients with Chiari malformation type I and syringomyelia: a study from the Park-Reeves Syringomyelia Research Consortium. J Neurosurg Pediatr 2022; 30:39-51. [PMID: 35426814 DOI: 10.3171/2022.2.peds21446] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 02/28/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The aim of this study was to determine differences in complications and outcomes between posterior fossa decompression with duraplasty (PFDD) and without duraplasty (PFD) for the treatment of pediatric Chiari malformation type I (CM1) and syringomyelia (SM). METHODS The authors used retrospective and prospective components of the Park-Reeves Syringomyelia Research Consortium database to identify pediatric patients with CM1-SM who received PFD or PFDD and had at least 1 year of follow-up data. Preoperative, treatment, and postoperative characteristics were recorded and compared between groups. RESULTS A total of 692 patients met the inclusion criteria for this database study. PFD was performed in 117 (16.9%) and PFDD in 575 (83.1%) patients. The mean age at surgery was 9.86 years, and the mean follow-up time was 2.73 years. There were no significant differences in presenting signs or symptoms between groups, although the preoperative syrinx size was smaller in the PFD group. The PFD group had a shorter mean operating room time (p < 0.0001), fewer patients with > 50 mL of blood loss (p = 0.04), and shorter hospital stays (p = 0.0001). There were 4 intraoperative complications, all within the PFDD group (0.7%, p > 0.99). Patients undergoing PFDD had a 6-month complication rate of 24.3%, compared with 13.7% in the PFD group (p = 0.01). There were no differences between groups for postoperative complications beyond 6 months (p = 0.33). PFD patients were more likely to require revision surgery (17.9% vs 8.3%, p = 0.002). PFDD was associated with greater improvements in headaches (89.6% vs 80.8%, p = 0.04) and back pain (86.5% vs 59.1%, p = 0.01). There were no differences between groups for improvement in neurological examination findings. PFDD was associated with greater reduction in anteroposterior syrinx size (43.7% vs 26.9%, p = 0.0001) and syrinx length (18.9% vs 5.6%, p = 0.04) compared with PFD. CONCLUSIONS PFD was associated with reduced operative time and blood loss, shorter hospital stays, and fewer postoperative complications within 6 months. However, PFDD was associated with better symptom improvement and reduction in syrinx size and lower rates of revision decompression. The two surgeries have low intraoperative complication rates and comparable complication rates beyond 6 months.
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Affiliation(s)
- S Hassan A Akbari
- 1Division of Pediatric Neurosurgery, Penn State Health Children's Hospital, Hershey, PA
| | - Alexander T Yahanda
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
| | - Laurie L Ackerman
- 3Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - P David Adelson
- 4Division of Pediatric Neurosurgery, Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ
| | - Raheel Ahmed
- 5Department of Neurological Surgery, University of Wisconsin at Madison, Madison, WI
| | - Gregory W Albert
- 6Division of Neurosurgery, Arkansas Children's Hospital, Little Rock, AR
| | - Philipp R Aldana
- 7Division of Pediatric Neurosurgery, University of Florida College of Medicine, Jacksonville, FL
| | - Tord D Alden
- 8Division of Pediatric Neurosurgery, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - Richard C E Anderson
- 9Division of Pediatric Neurosurgery, Department of Neurological Surgery, Children's Hospital of New York, Columbia-Presbyterian, New York, NY
| | - David F Bauer
- 10Division of Pediatric Neurosurgery, Texas Children's Hospital, Houston, TX
| | - Tammy Bethel-Anderson
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
| | - Karin Bierbrauer
- 36Division of Pediatric Neurosurgery, Cincinnati Children's Medical Center, Cincinnati, OH
| | - Douglas L Brockmeyer
- 11Division of Pediatric Neurosurgery, Primary Children's Hospital, Salt Lake City, UT
| | - Joshua J Chern
- 12Division of Pediatric Neurosurgery, Children's Healthcare of Atlanta University, Atlanta, GA
| | - Daniel E Couture
- 13Department of Neurological Surgery, Wake Forest University School of Medicine, Winston-Salem, NC
| | | | - Brian J Dlouhy
- 15Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA
| | - Susan R Durham
- 16Division of Pediatric Neurosurgery, Children's Hospital of Los Angeles, Los Angeles, CA
| | | | - Ramin Eskandari
- 18Department of Neurosurgery, Medical University of South Carolina, Charleston, SC
| | - Herbert E Fuchs
- 19Department of Neurosurgery, Duke University School of Medicine, Durham, NC
| | - Gerald A Grant
- 20Division of Pediatric Neurosurgery, Lucile Packard Children's Hospital, Palo Alto, CA
| | - Patrick C Graupman
- 21Division of Pediatric Neurosurgery, Gillette Children's Hospital, St. Paul, MN
| | - Stephanie Greene
- 22Division of Pediatric Neurosurgery, Children's Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Jeffrey P Greenfield
- 23Department of Neurological Surgery, Weill Cornell Medical College, NewYork-Presbyterian Hospital, New York, NY
| | - Naina L Gross
- 24Department of Neurosurgery, University of Oklahoma, Oklahoma City, OK
| | - Daniel J Guillaume
- 25Department of Neurosurgery, University of Minnesota Medical School, Minneapolis, MN
| | - Todd C Hankinson
- 26Department of Neurosurgery, Children's Hospital Colorado, Aurora, CO
| | - Gregory G Heuer
- 27Division of Pediatric Neurosurgery, Children's Hospital of Philadelphia, Philadelphia, PA
| | - Mark Iantosca
- 1Division of Pediatric Neurosurgery, Penn State Health Children's Hospital, Hershey, PA
| | - Bermans J Iskandar
- 5Department of Neurological Surgery, University of Wisconsin at Madison, Madison, WI
| | - Eric M Jackson
- 28Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - George I Jallo
- 29Division of Neurosurgery, Johns Hopkins All Children's Hospital, St. Petersburg, FL
| | - James M Johnston
- 30Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, AL
| | - Bruce A Kaufman
- 31Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
| | - Robert F Keating
- 32Department of Neurosurgery, Children's National Medical Center, Washington, DC
| | - Nicklaus R Khan
- 33Department of Neurosurgery, The University of Tennessee Health Science Center, Memphis, TN
| | - Mark D Krieger
- 16Division of Pediatric Neurosurgery, Children's Hospital of Los Angeles, Los Angeles, CA
| | - Jeffrey R Leonard
- 34Division of Pediatric Neurosurgery, Nationwide Children's Hospital, Columbus, OH
| | - Cormac O Maher
- 35Department of Neurosurgery, University of Michigan, Ann Arbor, MI
| | - Francesco T Mangano
- 36Division of Pediatric Neurosurgery, Cincinnati Children's Medical Center, Cincinnati, OH
| | - J Gordon McComb
- 16Division of Pediatric Neurosurgery, Children's Hospital of Los Angeles, Los Angeles, CA
| | - Sean D McEvoy
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
| | - Thanda Meehan
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
| | - Arnold H Menezes
- 15Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA
| | - Michael S Muhlbauer
- 33Department of Neurosurgery, The University of Tennessee Health Science Center, Memphis, TN
| | - Brent R O'Neill
- 26Department of Neurosurgery, Children's Hospital Colorado, Aurora, CO
| | - Greg Olavarria
- 37Division of Pediatric Neurosurgery, Arnold Palmer Hospital for Children, Orlando, FL
| | - John Ragheb
- 38Department of Neurological Surgery, University of Miami School of Medicine, Miami, FL
| | - Nathan R Selden
- 39Department of Neurological Surgery and Doernbecher Children's Hospital, Oregon Health & Science University, Portland, OR
| | - Manish N Shah
- 40Division of Pediatric Neurosurgery, McGovern Medical School, Houston, TX
| | - Chevis N Shannon
- 41Division of Pediatric Neurosurgery, Monroe Carell Jr. Children's Hospital at Vanderbilt University, Nashville, TN
| | - Joshua S Shimony
- 42Department of Radiology, Washington University School of Medicine, St. Louis, MO
| | - Matthew D Smyth
- 29Division of Neurosurgery, Johns Hopkins All Children's Hospital, St. Petersburg, FL
| | - Scellig S D Stone
- 43Division of Pediatric Neurosurgery, Boston Children's Hospital, Boston, MA
| | - Jennifer M Strahle
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
| | - Mandeep S Tamber
- 44Division of Neurosurgery, The University of British Columbia, Vancouver, BC, Canada
| | - James C Torner
- 15Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA
| | - Gerald F Tuite
- 29Division of Neurosurgery, Johns Hopkins All Children's Hospital, St. Petersburg, FL
| | | | - Scott D Wait
- 46Carolina Neurosurgery & Spine Associates, Charlotte, NC
| | - John C Wellons
- 41Division of Pediatric Neurosurgery, Monroe Carell Jr. Children's Hospital at Vanderbilt University, Nashville, TN
| | - William E Whitehead
- 10Division of Pediatric Neurosurgery, Texas Children's Hospital, Houston, TX
| | - Tae Sung Park
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
| | - David D Limbrick
- 2Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO
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Turk ML, Schmidt K, McGrath ML. Diagnosis, Management, and Return to Sport of a 16-Year-Old Patient With a Chiari I Malformation: A Case Report and Literature Review. J Athl Train 2022; 57:177-183. [PMID: 34185839 PMCID: PMC8876886 DOI: 10.4085/1062-6050-0001.21] [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: 02/03/2023]
Abstract
This case report discusses a 16-year-old female volleyball, basketball, and track and field athlete who was diagnosed with a Chiari I malformation after a concussion. Surgical decompression was recommended and performed 3 months after her initial diagnosis. This patient presented unique challenges due to her age, desire to return to sport, and lack of access to medical care due to living in a rural area. Few evidence-based best-practice recommendations are available for the management and return to sport of patients with Chiari I malformation, particularly for those who have undergone surgical decompression. In this case study, we address the treatment and return-to-sport process for the patient and provide a comprehensive review of the published literature on patients attempting to return to sport after a diagnosis of Chiari I malformation. In addition, we explore the value of an athletic trainer in reconciling various barriers in management and return to sport evident in this case and the reviewed literature.
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Affiliation(s)
| | - Kelly Schmidt
- Pediatric Neurosurgery, Logan Health Children's, Kalispell, MT
| | - Melanie L. McGrath
- School of Integrative Physiology and Athletic Training, University of Montana, Missoula
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Cater DT, Rogerson CM, Hobson MJ, Ackerman LL, Rowan CM. The association of postoperative dexmedetomidine with pain, opiate utilization, and hospital length of stay in children post-Chiari malformation decompression. J Neurosurg Pediatr 2021:1-7. [PMID: 34891134 PMCID: PMC9359455 DOI: 10.3171/2021.10.peds21291] [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: 06/01/2021] [Accepted: 10/11/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The aim of this study was to determine the association of postoperative dexmedetomidine with markers of pain in children undergoing Chiari malformation decompression. The authors hypothesized that patients receiving dexmedetomidine postoperatively would have decreased cumulative opiate use. They further hypothesized that there would be no difference in median pain scores, outcomes, or medication adverse events. METHODS An IRB-approved retrospective cohort study of patients undergoing Chiari malformation decompression from December 1, 2015, to December 31, 2018, was performed. Patients aged 0-21 years who underwent intradural Chiari malformation decompression at a single institution were included. Data for those who used dexmedetomidine postoperatively were compared with those who did not use dexmedetomidine. The primary outcome was cumulative opiate use throughout hospitalization. Secondary outcomes included pain scores, ancillary medication use, adverse events, hospital and ICU length of stay, readmission rates, and hospital cost. RESULTS The authors reviewed the records of 172 patients who underwent Chiari malformation decompression. Of those patients, 86 received dexmedetomidine postoperatively and 86 did not. Demographics were not different between the groups. Patients who received dexmedetomidine postoperatively received more doses of dexamethasone and were also more frequently exposed to dexmedetomidine intraoperatively (p = 0.028). Patients who received dexmedetomidine postoperatively used fewer morphine equivalents during their admission (1.02 mg/kg vs 1.43 mg/kg, p = 0.003). The patients who received dexmedetomidine postoperatively also had lower median pain scores on postoperative day 0 (0 vs 2, p < 0.001), lower median pain scores throughout the entire admission (1 vs 2, p < 0.001), and lower maximum pain scores recorded (6 vs 8, p = 0.005). Adjusting for steroid dose number and intraoperative dexmedetomidine exposure, postoperative dexmedetomidine remained associated with lower opiate dosing, lower pain scores on postoperative day 0, lower scores throughout hospital stay, and lower maximum pain scores. Patients who received dexmedetomidine had shorter hospital lengths of stay by 19 hours (p < 0.001). There were no statistically significant differences in medication adverse events or hospital costs between the two groups. CONCLUSIONS Postoperative dexmedetomidine use was associated with decreased opiate use, lower pain scores, and shorter hospital length of stay in this cohort. Dexmedetomidine may be considered as a safe adjuvant medication that may have opiate-sparing effects for this patient population.
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Affiliation(s)
- Daniel T. Cater
- Indiana University School of Medicine, Department of Pediatrics, Division of Critical Care, Indianapolis, Indiana
| | - Colin M. Rogerson
- Indiana University School of Medicine, Department of Pediatrics, Division of Critical Care, Indianapolis, Indiana
| | - Michael J. Hobson
- Indiana University School of Medicine, Department of Pediatrics, Division of Critical Care, Indianapolis, Indiana
| | - Laurie L. Ackerman
- Indiana University School of Medicine, Department of Neurological Surgery, Indianapolis, Indiana
| | - Courtney M. Rowan
- Indiana University School of Medicine, Department of Pediatrics, Division of Critical Care, Indianapolis, Indiana
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Marianayagam NJ, Chae JK, Hussain I, Cruz A, Baaj AA, Härtl R, Greenfield JP. Increase in clivo-axial angle is associated with clinical improvement in children undergoing occipitocervical fusion for complex Chiari malformation: patient series. JOURNAL OF NEUROSURGERY: CASE LESSONS 2021; 2:CASE21433. [PMID: 36061080 PMCID: PMC9435577 DOI: 10.3171/case21433] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND The authors analyzed the pre- and postoperative morphometric properties of pediatric patients with complex Chiari malformation undergoing occipitocervical fusion (OCF) to assess clinical outcomes and morphometric properties that might influence postoperative outcomes. OBSERVATIONS The authors retrospectively reviewed 35 patients younger than 22 years with Chiari malformation who underwent posterior fossa decompression and OCF with or without endoscopic endonasal odontoidectomy at their institution (13 with and 22 without odontoidectomy). Clivo-axial angle (CXA), pB-C2, atlantodental interval, basion-dens interval, basion-axial interval, and canal diameter at the level of C1 were measured on preoperative and approximately 3-month postoperative computed tomography or magnetic resonance imaging. The authors further stratified the patient cohort into three age groups and compared the three cohorts. The most common presenting symptoms were headache, neck/shoulder pain, and dysphagia; 80% of the cohort had improved clinical outcomes. CXA increased significantly after surgery. When stratified into those who showed postoperative improvement and those who did not, only the former showed a significant increase in CXA. After age stratification, the significant changes in CXA were observed in the 7- to 13-year-old and 14- to 21-year-old cohorts. LESSONS CXA may be the most important morphometric predictor of clinical outcomes after OCF in pediatric patients with complex Chiari malformation.
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Affiliation(s)
- Neelan J. Marianayagam
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - John K. Chae
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Ibrahim Hussain
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Amanda Cruz
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Ali A. Baaj
- Department of Neurosurgery, University of Arizona College of Medicine, Phoenix, Arizona
| | - Roger Härtl
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
| | - Jeffrey P. Greenfield
- Department of Neurological Surgery, Weill Cornell Medicine/NewYork-Presbyterian Hospital, New York, New York; and
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Akbari SHA, Rizvi AA, CreveCoeur TS, Han RH, Greenberg JK, Torner J, Brockmeyer DL, Wellons JC, Leonard JR, Mangano FT, Johnston JM, Shah MN, Iskandar BJ, Ahmed R, Tuite GF, Kaufman BA, Daniels DJ, Jackson EM, Grant GA, Powers AK, Couture DE, Adelson PD, Alden TD, Aldana PR, Anderson RCE, Selden NR, Bierbrauer K, Boydston W, Chern JJ, Whitehead WE, Dauser RC, Ellenbogen RG, Ojemann JG, Fuchs HE, Guillaume DJ, Hankinson TC, O'Neill BR, Iantosca M, Oakes WJ, Keating RF, Klimo P, Muhlbauer MS, McComb JG, Menezes AH, Khan NR, Niazi TN, Ragheb J, Shannon CN, Smith JL, Ackerman LL, Jea AH, Maher CO, Narayan P, Albert GW, Stone SSD, Baird LC, Gross NL, Durham SR, Greene S, McKinstry RC, Shimony JS, Strahle JM, Smyth MD, Dacey RG, Park TS, Limbrick DD. Socioeconomic and demographic factors in the diagnosis and treatment of Chiari malformation type I and syringomyelia. J Neurosurg Pediatr 2021:1-10. [PMID: 34861643 DOI: 10.3171/2021.9.peds2185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 09/16/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The goal of this study was to assess the social determinants that influence access and outcomes for pediatric neurosurgical care for patients with Chiari malformation type I (CM-I) and syringomyelia (SM). METHODS The authors used retro- and prospective components of the Park-Reeves Syringomyelia Research Consortium database to identify pediatric patients with CM-I and SM who received surgical treatment and had at least 1 year of follow-up data. Race, ethnicity, and insurance status were used as comparators for preoperative, treatment, and postoperative characteristics and outcomes. RESULTS A total of 637 patients met inclusion criteria, and race or ethnicity data were available for 603 (94.7%) patients. A total of 463 (76.8%) were non-Hispanic White (NHW) and 140 (23.2%) were non-White. The non-White patients were older at diagnosis (p = 0.002) and were more likely to have an individualized education plan (p < 0.01). More non-White than NHW patients presented with cerebellar and cranial nerve deficits (i.e., gait ataxia [p = 0.028], nystagmus [p = 0.002], dysconjugate gaze [p = 0.03], hearing loss [p = 0.003], gait instability [p = 0.003], tremor [p = 0.021], or dysmetria [p < 0.001]). Non-White patients had higher rates of skull malformation (p = 0.004), platybasia (p = 0.002), and basilar invagination (p = 0.036). Non-White patients were more likely to be treated at low-volume centers than at high-volume centers (38.7% vs 15.2%; p < 0.01). Non-White patients were older at the time of surgery (p = 0.001) and had longer operative times (p < 0.001), higher estimated blood loss (p < 0.001), and a longer hospital stay (p = 0.04). There were no major group differences in terms of treatments performed or complications. The majority of subjects used private insurance (440, 71.5%), whereas 175 (28.5%) were using Medicaid or self-pay. Private insurance was used in 42.2% of non-White patients compared to 79.8% of NHW patients (p < 0.01). There were no major differences in presentation, treatment, or outcome between insurance groups. In multivariate modeling, non-White patients were more likely to present at an older age after controlling for sex and insurance status (p < 0.01). Non-White and male patients had a longer duration of symptoms before reaching diagnosis (p = 0.033 and 0.004, respectively). CONCLUSIONS Socioeconomic and demographic factors appear to influence the presentation and management of patients with CM-I and SM. Race is associated with age and timing of diagnosis as well as operating room time, estimated blood loss, and length of hospital stay. This exploration of socioeconomic and demographic barriers to care will be useful in understanding how to improve access to pediatric neurosurgical care for patients with CM-I and SM.
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Affiliation(s)
- Syed Hassan A Akbari
- 1Department of Neurosurgery, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | | | | | | | | | - James Torner
- 4Department of Epidemiology, University of Iowa, Iowa City, Iowa
| | - Douglas L Brockmeyer
- 5Department of Pediatric Neurosurgery, University of Utah School of Medicine, Salt Lake City, Utah
| | - John C Wellons
- 6Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jeffrey R Leonard
- 7Department of Neurological Surgery, The Ohio State University College of Medicine, Columbus, Ohio
| | - Francesco T Mangano
- 8Division of Pediatric Neurosurgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - James M Johnston
- 9Division of Neurosurgery, University of Alabama School of Medicine, Birmingham, Alabama
| | - Manish N Shah
- 10Department of Pediatric Surgery and Neurosurgery, The University of Texas McGovern Medical School, Houston, Texas
| | - Bermans J Iskandar
- 11Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Raheel Ahmed
- 11Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Gerald F Tuite
- 12Department of Neurosurgery, Neuroscience Institute, All Children's Hospital, St. Petersburg, Florida
| | - Bruce A Kaufman
- 13Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - David J Daniels
- 14Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota
| | - Eric M Jackson
- 15Department of Neurosurgery, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Gerald A Grant
- 16Department of Neurosurgery, Stanford Child Health Research Institute, Stanford, California
| | - Alexander K Powers
- 17Department of Neurosurgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - Daniel E Couture
- 17Department of Neurosurgery, Wake Forest Baptist Medical Center, Winston-Salem, North Carolina
| | - P David Adelson
- 18Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona
| | - Tord D Alden
- 19Department of Pediatric Neurosurgery, Ann & Robert H. Lurie Children's Hospital of Chicago, Illinois
| | - Philipp R Aldana
- 20Department of Pediatric Neurosurgery, University of Florida College of Medicine, Jacksonville, Florida
| | - Richard C E Anderson
- 21Department of Neurological Surgery, Columbia University College of Physicians and Surgeons, New York, New York
| | - Nathan R Selden
- 22Department of Neurological Surgery, Oregon Health & Science University, Portland, Oregon
| | - Karin Bierbrauer
- 8Division of Pediatric Neurosurgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - William Boydston
- 23Department of Neurosurgery, Children's Healthcare of Atlanta, Georgia
| | - Joshua J Chern
- 23Department of Neurosurgery, Children's Healthcare of Atlanta, Georgia
| | | | - Robert C Dauser
- 24Department of Neurosurgery, Baylor College of Medicine, Houston, Texas
| | - Richard G Ellenbogen
- 25Department of Neurosurgery, University of Washington Medicine, Seattle, Washington
| | - Jeffrey G Ojemann
- 25Department of Neurosurgery, University of Washington Medicine, Seattle, Washington
| | - Herbert E Fuchs
- 26Department of Neurosurgery, Duke University School of Medicine, Durham, North Carolina
| | - Daniel J Guillaume
- 27Department of Neurosurgery, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Todd C Hankinson
- 28Department of Neurosurgery, Children's Hospital Colorado, Aurora, Colorado
| | - Brent R O'Neill
- 28Department of Neurosurgery, Children's Hospital Colorado, Aurora, Colorado
| | - Mark Iantosca
- 1Department of Neurosurgery, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - W Jerry Oakes
- 9Division of Neurosurgery, University of Alabama School of Medicine, Birmingham, Alabama
| | - Robert F Keating
- 29Department of Neurosurgery, Children's National Medical Center, Washington, DC
| | - Paul Klimo
- 30Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Michael S Muhlbauer
- 30Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee
| | - J Gordon McComb
- 31Division of Neurosurgery, Children's Hospital Los Angeles, California
| | - Arnold H Menezes
- 32Department of Neurosurgery, University of Iowa Hospitals, Iowa City, Iowa
| | - Nickalus R Khan
- 33Department of Pediatric Neurosurgery, Miami Children's Hospital and University of Miami Miller School of Medicine, Miami, Florida
| | - Toba N Niazi
- 33Department of Pediatric Neurosurgery, Miami Children's Hospital and University of Miami Miller School of Medicine, Miami, Florida
| | - John Ragheb
- 33Department of Pediatric Neurosurgery, Miami Children's Hospital and University of Miami Miller School of Medicine, Miami, Florida
| | - Chevis N Shannon
- 6Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jodi L Smith
- 34Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Laurie L Ackerman
- 34Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Andrew H Jea
- 34Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Cormac O Maher
- 35Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - Prithvi Narayan
- 36Department of Neurological Surgery, St. Christopher's Hospital, Philadelphia, Pennsylvania
| | - Gregory W Albert
- 37Department of Neurosurgery, University of Arkansas College of Medicine, Little Rock, Arkansas
| | - Scellig S D Stone
- 38Department of Neurosurgery, Harvard Medical School, Boston, Massachusetts
| | - Lissa C Baird
- 38Department of Neurosurgery, Harvard Medical School, Boston, Massachusetts
| | - Naina L Gross
- 39Department of Neurosurgery, University of Oklahoma, Oklahoma City, Oklahoma
| | - Susan R Durham
- 40Division of Neurosurgery, University of Vermont Medical Center, Burlington, Vermont; and
| | - Stephanie Greene
- 41Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Robert C McKinstry
- 3Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Joshua S Shimony
- 3Radiology, Washington University School of Medicine, St. Louis, Missouri
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Clinicoradiographic data and management of children with Chiari malformation type 1 and 1.5: an Italian case series. Acta Neurol Belg 2021; 121:1547-1554. [PMID: 32524535 DOI: 10.1007/s13760-020-01398-z] [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: 04/01/2020] [Accepted: 06/02/2020] [Indexed: 10/24/2022]
Abstract
INTRODUCTION The widespread use of imaging has increased Chiari malformation (CM) diagnosis. CM shows clinical heterogeneity that makes management controversial. We aimed to evaluate the occurrence and clinical and radiographic presentation of children with CM-1 and CM-1.5, reporting possible differences according to age and management. METHODS We retrospectively reviewed 46 children diagnosed with CM-1 or CM-1.5, between 2006 and 2019 at our institute. We evaluated for each subject: reason for hospital admission, clinical presentation, age at diagnosis, extent of cerebellar tonsillar herniation (CTH) and type of treatment when carried out. Affected children were assigned to three age groups. In some patients, a clinical follow-up was carried out. RESULTS Mean age at diagnosis was 7.61 years. Mean CTH was 8.72 mm. Syringomyelia was found in 10.9%. Twenty-six individuals (56.5%) were symptomatic. The most frequent symptom was headache (34.8%). There were no statistically significant differences between the age groups with regard to the amount of CTH (p = 0.81). Thirteen children (28.3%) underwent surgical treatment. CTH was significantly higher in the surgical group (p < 0.01). Twenty-three patients (50%) performed a 3-year mean follow-up, 17 of whom had no surgery treatment. CTH was stable in 58.8%, reduced in three and increased in three, without any change in symptoms. Only one child showed a worsening in herniation and symptoms, then requiring surgery. CONCLUSION Frequency and type of symptoms were consistent with those reported in the literature. Conservative approach is a viable option for minimally symptomatic patients, most of whom did not show clinical worsening at follow-up.
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Saletti V, Farinotti M, Peretta P, Massimi L, Ciaramitaro P, Motta S, Solari A, Valentini LG. The management of Chiari malformation type 1 and syringomyelia in children: a review of the literature. Neurol Sci 2021; 42:4965-4995. [PMID: 34591209 DOI: 10.1007/s10072-021-05565-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 08/12/2021] [Indexed: 11/28/2022]
Abstract
In anticipation of the "Chiari and Syringomyelia Consensus Conference" held in Milan in 2019, we performed a systematic literature review on the management of Chiari malformation type 1 (CM1) and syringomyelia (Syr) in children.We aimed to summarize the available evidence and identify areas where consensus has not been reached and further research is needed.In accordance with PRISMA guidelines, we formulated seven questions in Patients-Interventions-Comparators-Outcomes (PICO) format. Six PICOs concerned CM1 children with/without additional structural anomalies (Syr, craniosynostosis, hydrocephalus, tethered cord, and cranio-vertebral junction anomalies), and one PICO Syr without CM1. We searched Medline, Embase, Cochrane, and NICE databases from January 1, 1999, to May 29, 2019. Cohort studies, controlled and randomized clinical trials (CCTs, RCTs), and systematic reviews were included, all pertinent only to patients ≤ 18 years of age.For CM1, 3787 records were found, 460 full texts were assessed and 49 studies (46 cohort studies, one RCT, and two systematic reviews) were finally included. For Syr, 376 records were found, 59 full texts were assessed, and five studies (one RCT and four cohort studies) were included. Data on each PICO were synthetized narratively due to heterogeneity in the inclusion criteria, outcome measures, and length of follow-up of the included studies.Despite decades of experience on CM1 and Syr management in children, the available evidence remains limited. Specifically, there is an urgent need for collaborative initiatives focusing on the adoption of shared inclusion criteria and outcome measures, as well as rigorous prospective designs, particularly RCTs.
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Affiliation(s)
- Veronica Saletti
- Developmental Neurology Unit, Mariani Foundation Center for Complex Disabilities, Fondazione IRCCS Istituto Neurologico Carlo Besta, Via Giovanni Celoria, 11, 20133, Milan, Italy.
| | - Mariangela Farinotti
- Unit of Neuroepidemiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Paola Peretta
- Pediatric Neurosurgery Unit, Ospedale Infantile Regina Margherita, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Turin, Italy
| | - Luca Massimi
- Pediatric Neurosurgery Unit, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Università Cattolica Sacro Cuore, Rome, Italy
| | - Palma Ciaramitaro
- Clinical Neurophysiology, Department of Neuroscience, Presidio CTO, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Turin, Italy
| | - Saba Motta
- Scientific Library, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Alessandra Solari
- Unit of Neuroepidemiology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Laura Grazia Valentini
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
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Chotai S, Nadel JL, Holste KG, Mossner JM, Smith BW, Kapurch JR, Muraszko KM, Garton HJL, Maher CO, Strahle JM. Longitudinal scoliosis behavior in Chiari malformation with and without syringomyelia. J Neurosurg Pediatr 2021; 28:585-591. [PMID: 34479199 DOI: 10.3171/2021.5.peds20915] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 05/11/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The objective of this study was to understand the natural history of scoliosis in patients with Chiari malformation type I (CM-I) with and without syringomyelia. METHODS A retrospective review of data was conducted. Patients with CM-I were identified from a cohort of 14,118 individuals age 18 years or younger who had undergone MRI over an 11-year period at the University of Michigan. Patients eligible for study inclusion had a coronal curve ≥ 10° on radiography, associated CM-I with or without syringomyelia, and at least 1 year of clinical follow-up prior to any surgery. Curve magnitude at initial diagnosis, prior to posterior fossa decompression (PFD; if applicable), and at the last follow-up (prior to any surgical correction of scoliosis) was recorded, and clinical and radiographic characteristics were noted. The change in curve magnitude by 10° was defined as curve progression (increase by 10°) or regression (decrease by 10°). RESULTS Forty-three patients met the study inclusion criteria and were analyzed. About one-third (35%) of the patients presented with symptoms attributed to their CM-I. The mean degree of scoliosis at presentation was 32.6° ± 17.7°. Twenty-one patients (49%) had an associated syrinx. The mean tonsil position below the level of the foramen magnum was 9.8 ± 5.8 mm. Patients with a syrinx were more likely to have a curve > 20° (86% vs 41%, p = 0.002). Curve magnitude remained stable (≤ ±10°) in 77% of patients (33/43), progressed in 16% (7/43), and regressed in 7% (3/43). Mean age was higher (14.8 ± 0.59 years) among patients with regressed curves (p = 0.026). All regressed curves initially measured ≤ 20° (mean 14° ± 5.3°), and none of the patients with regressed curves had a syrinx. The change in curve magnitude was statistically similar in patients with (7.32° ± 17.7°) and without (5.32° ± 15.8°) a syrinx (p = 0.67). After a mean follow-up of 3.13 ± 2.04 years prior to surgery, 27 patients (63%) ultimately underwent posterior fossa or scoliosis correction surgery. For those who eventually underwent PFD only, the rate of change in curve magnitude prior to surgery was 0.054° ± 0.79°. The rate of change in curve magnitude was statistically similar before (0.054° ± 0.79°) and after (0.042° ± 0.33°) surgery (p = 0.45) for patients who underwent PFD surgery only. CONCLUSIONS The natural history of scoliosis in the presence of CM-I is variable, though most curves remained stable. All curves that regressed were ≤ 20° at initial diagnosis, and most patients in such cases were older at scoliosis diagnosis. Patients who underwent no surgery or PFD only had similar profiles for the change in curve magnitude, which remained relatively stable overall, as compared to patients who underwent PFD and subsequent fusion, who demonstrated curve progression. Among the patients with a syrinx, no curves regressed, most remained stable, and some progressed. Understanding this variability is a first step toward building a prediction model for outcomes for these patients.
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Affiliation(s)
- Silky Chotai
- 1Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Jeffrey L Nadel
- 2Department of Neurosurgery, University of Utah, Salt Lake City, Utah
| | - Katherine G Holste
- 3Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - James M Mossner
- 3Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - Brandon W Smith
- 3Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - Joseph R Kapurch
- 4Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota; and
| | - Karin M Muraszko
- 3Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - Hugh J L Garton
- 3Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
| | - Cormac O Maher
- 3Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan
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Mozaffari K, Davidson L, Chalif E, Phan TN, Sparks AD, Myseros JS, Oluigbo CO, Keating RF. Long-term outcomes of posterior fossa decompression for Chiari malformation type 1: which patients are most prone to failure? Childs Nerv Syst 2021; 37:2891-2898. [PMID: 34232379 DOI: 10.1007/s00381-021-05280-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 06/29/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE The role of an osseous-only posterior fossa decompression (PFD) for Chiari malformation type 1 (CM1) remains controversial. We reviewed long-term outcomes for patients with CM1 undergoing a PFD to evaluate if there was any difference for failure when compared to patients undergoing a PFD with duraplasty (PFDD). METHODS Consecutive patients surgically treated at a single tertiary pediatric neurosurgery clinic over a 25-year period with at least 5 years of follow-up were evaluated. PFD patients were compared to those that initially received a PFDD. Demographics, surgical indications, surgical approach, outcomes, and complications were reviewed. RESULTS A total of 60 patients were included in this study of which 25 (41.67%) underwent PFD and 35 (58.33%) underwent PFDD. Mean age at surgery was 7.41 years (range 0.4 to 18 years) with a mean follow-up of 8.23 years (range 5 to 21 years). Those that received a PFD had a lower rate of radiographic syrinx improvement (p = 0.03), especially in the setting of holocord syringes. Failure rate was significantly higher in the PFD group (20% vs 2.90%, p = 0.03). However, complications were significantly higher in the PFDD group (17.14% vs 4.0%, p = 0.04). CONCLUSIONS PFD provides a safe treatment option with similar clinical improvements and lower post-operative complication rate compared to PFDD, albeit at the cost of greater chance of reoperation, especially in the setting of a holocord syrinx. Patients with a holocord syrinx should be considered for a PFDD as their initial procedure.
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Affiliation(s)
- Khashayar Mozaffari
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA.
| | - Laurence Davidson
- Division of Neurosurgery, Children's National Hospital, Washington, DC, USA
| | - Eric Chalif
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Tiffany N Phan
- Division of Neurosurgery, Children's National Hospital, Washington, DC, USA
| | - Andrew D Sparks
- Department of Surgery, The George Washington University Hospital, Washington, DC, USA
| | - John S Myseros
- Division of Neurosurgery, Children's National Hospital, Washington, DC, USA
| | - Chima O Oluigbo
- Division of Neurosurgery, Children's National Hospital, Washington, DC, USA
| | - Robert F Keating
- Division of Neurosurgery, Children's National Hospital, Washington, DC, USA
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Abu-Arafeh I, Valeriani M, Prabhakar P. Headache in Children and Adolescents: A Focus on Uncommon Headache Disorders. Indian Pediatr 2021. [DOI: 10.1007/s13312-021-2287-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Abstract
Chiari malformation type 1 (CM1) is often found incidentally. However, patients with symptoms or signs referable to CM1 or an associated syrinx will likely benefit from surgical intervention. Patients who are not symptomatic from CM1 at presentation are unlikely to become symptomatic at follow-up.
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Affiliation(s)
- Gregory W Albert
- Arkansas Children's Hospital, 1 Children's Way, Slot 838, Little Rock, AR 72202, USA.
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Kotaki Y, Hattori G, Uchikado H, Komaki S, Takeshige N, Miyahara T, Hasegawa Y, Morioka M. "Motion-specific Headache": A Predictor for Diagnosis and Favorable Prognosis after Surgery in Young Patients with Chiari Malformation Type 1. Neurol Med Chir (Tokyo) 2021; 61:577-582. [PMID: 34321386 PMCID: PMC8531875 DOI: 10.2176/nmc.oa.2020-0427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
As headache is known as one of the most common symptoms in the patients with Chiari malformation type 1 (CM1), it is difficult to find out CM1-related headache among the symptoms because headache itself is commonly seen. Herein, we retrospectively review the cases of six CM1 patients complaining only of headache by which they complained of deterioration in daily life activities. The symptom of headache worsened during anteflexion (n = 2; 33%), retroflexion (n = 1; 17%), jumping (n = 3; 50%), going up the stairs (n = 1; 17%), and running (n = 1; 17%). Mean age at the onset was 15.7 years old (ranging 11–18) and four out of six were female. These inductive factors were clearly different from “Valsalva-like maneuvers,” although the mechanism might originate from dynamic tonsil changes. We named these headaches as “motion-specific.” These headaches radiated to the posterior side. MRI revealed that the extent of tonsillar ectopia was 11.3 mm, while syringomyelia was observed in three out of six patients (50%). All patients underwent surgical treatment, with the “motion-specific headache” completely disappearing 12.5 days thereafter. Although headaches are common, “motion-specific headache” may be a good candidate symptom to distinguish CM1 patients, especially among teenagers with headaches, and a good predictor for favorable outcomes after surgical treatment.
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Affiliation(s)
- Yoshikuni Kotaki
- Department of Neurosurgery, Kurume University School of Medicine
| | - Gohsuke Hattori
- Department of Neurosurgery, Kurume University School of Medicine
| | - Hisaaki Uchikado
- Department of Neurosurgery, Kurume University School of Medicine
| | - Satoru Komaki
- Department of Neurosurgery, Kurume University School of Medicine
| | | | | | - Yu Hasegawa
- Department of Neurosurgery, Kurume University School of Medicine.,Department of Pharmaceutical Sciences, School of Pharmacy at Fukuoka, International University of Health and Welfare
| | - Motohiro Morioka
- Department of Neurosurgery, Kurume University School of Medicine
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Jussila MP, Nissilä J, Vakkuri M, Olsén P, Niinimäki J, Leinonen V, Serlo W, Salokorpi N, Suo-Palosaari M. Preoperative measurements on MRI in Chiari 1 patients fail to predict outcome after decompressive surgery. Acta Neurochir (Wien) 2021; 163:2005-2014. [PMID: 33977335 PMCID: PMC8195958 DOI: 10.1007/s00701-021-04842-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/30/2021] [Indexed: 11/27/2022]
Abstract
Background The purpose of our study was to research the parameters of magnetic resonance imaging (MRI) that would predict the outcome of surgery in patients with Chiari 1 malformation (CM1) and to evaluate changes in MRI parameters after surgery. Methods Fifty-one patients (19 children, 13 adolescents, and 19 adults) operated on due to CM1 in Oulu University Hospital between 2004 and 2018 were evaluated. Seventeen parameters were measured from the preoperative MRI and 11 from the postoperative MRI. The correlations between the MRI parameters and the clinical variables before and after surgery were analyzed. Results The majority (88.2%) of the patients had favorable surgical outcomes. Postoperatively, subjective symptoms improved in 88.6% of the patients and syringomyelia in 81.8%. The location of the cerebellar tonsils, when measured in relation to the C2 synchondrosis or the end plate, postoperatively moved cranially in 51.0% (n = 26), did not change in 27.4% (n = 14), and moved caudally in 21.6% (n = 11) of the patients. However, neither the location of the tonsils nor any other parameters measured from pre- or postoperative MRI correlated with the patients’ symptoms or surgical outcomes. Conclusions No specific parameters on preoperative MRI evaluation were predictive of the outcome of surgery, emphasizing clinical examination in surgical decision-making. Furthermore, the postoperative MRI parameters did not correlate with the surgical outcomes. Thus, routine postoperative imaging is suggested only for patients with preoperatively diagnosed syringomyelia or worsening of symptoms.
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Affiliation(s)
- Miro-Pekka Jussila
- Department of Diagnostic Radiology, Oulu University Hospital, Oulu and Research Unit of Medical Imaging, Physics, and Technology, Oulu University Hospital and University of Oulu, Kajaanintie 50, OYS, P.O. Box 50, 90029, Oulu, Finland
| | - Juho Nissilä
- Department of Diagnostic Radiology, Oulu University Hospital, Oulu and Research Unit of Medical Imaging, Physics, and Technology, Oulu University Hospital and University of Oulu, Kajaanintie 50, OYS, P.O. Box 50, 90029, Oulu, Finland
| | - Minna Vakkuri
- Department of Neurosurgery, Oulu University Hospital, Oulu and Research Unit of Clinical Neuroscience, Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Päivi Olsén
- Department of Children and Adolescents, Oulu University Hospital, Oulu and PEDEGO Research Unit, University of Oulu and Medical Research Center Oulu (MRC Oulu), Oulu, Finland
| | - Jaakko Niinimäki
- Department of Diagnostic Radiology, Oulu University Hospital, Oulu and Research Unit of Medical Imaging, Physics, and Technology, Oulu University Hospital and University of Oulu, Kajaanintie 50, OYS, P.O. Box 50, 90029, Oulu, Finland
| | - Ville Leinonen
- Department of Neurosurgery, Kuopio University Hospital, Kuopio and Institute of Clinical Medicine-Neurosurgery, University of Eastern Finland, Kuopio, Finland
| | - Willy Serlo
- Department of Children and Adolescents, Oulu University Hospital, Oulu and PEDEGO Research Unit, University of Oulu and Medical Research Center Oulu (MRC Oulu), Oulu, Finland
| | - Niina Salokorpi
- Department of Neurosurgery, Oulu University Hospital, Oulu and Research Unit of Clinical Neuroscience, Medical Research Center Oulu (MRC Oulu), Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Maria Suo-Palosaari
- Department of Diagnostic Radiology, Oulu University Hospital, Oulu and Research Unit of Medical Imaging, Physics, and Technology, Oulu University Hospital and University of Oulu, Kajaanintie 50, OYS, P.O. Box 50, 90029, Oulu, Finland.
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Seaman SC, Li L, Menezes AH, Dlouhy BJ. Fourth ventricle roof angle as a measure of fourth ventricle bowing and a radiographic predictor of brainstem dysfunction in Chiari malformation type I. J Neurosurg Pediatr 2021; 28:260-267. [PMID: 34171843 DOI: 10.3171/2021.1.peds20756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 01/26/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Chiari malformation type I (CM-I) is a congenital and developmental abnormality that results in tonsillar descent 5 mm below the foramen magnum. However, this cutoff value has poor specificity as a predictor of clinical severity. Therefore, the authors sought to identify a novel radiographic marker predictive of clinical severity to assist in the management of patients with CM-I. METHODS The authors retrospectively reviewed 102 symptomatic CM-I (sCM-I) patients and compared them to 60 age-matched normal healthy controls and 30 asymptomatic CM-I (aCM-I) patients. The authors used the fourth ventricle roof angle (FVRA) to identify fourth ventricle "bowing," a configuration change suggestive of fourth ventricle outlet obstruction, and compared these results across all three cohorts. A receiver operating characteristic (ROC) curve was used to identify a predictive cutoff for brainstem dysfunction. Binary logistic regression was used to determine whether bowing of the fourth ventricle was more predictive of brainstem dysfunction than tonsillar descent, clival canal angle, or obex position in aCM-I and sCM-I patients. RESULTS The FVRA had excellent interrater reliability (intraclass correlation 0.930, 95% CI 0.905-0.949, Spearman r2 = 0.766, p < 0.0001). The FVRA was significantly greater in the sCM-I group than the aCM-I and healthy control groups (59.3° vs 41.8° vs 45.2°, p < 0.0001). No difference was observed between aCM-I patients and healthy controls (p = 0.347). ROC analysis indicated that an FVRA of 65° had a specificity of 93% and a sensitivity of 50%, with a positive predictive value of 76% for brainstem dysfunction. FVRA > 65° was more predictive of brainstem dysfunction (OR 5.058, 95% CI 1.845-13.865, p = 0.002) than tonsillar herniation > 10 mm (OR 2.564, 95% CI 1.050-6.258, p = 0.039), although increasing age was also associated with brainstem dysfunction (OR 1.045, 95% CI 1.011-1.080, p = 0.009). A clival canal angle < 140° (p = 0.793) and obex below the foramen magnum (p = 0.563) had no association with brainstem dysfunction. CONCLUSIONS The authors identified a novel radiographic measure, the FVRA, that can be used to assess fourth ventricular bowing in CM-I and is more predictive of brainstem dysfunction than tonsillar herniation. The FVRA is easy to measure, has excellent interrater variability, and can be a reliable universal radiographic measure. The FVRA will be useful in further describing CM-I radiographically and clinically by identifying patients more likely to be symptomatic as a result of brainstem dysfunction.
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Affiliation(s)
- Scott C Seaman
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
| | - Luyuan Li
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
| | - Arnold H Menezes
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
| | - Brian J Dlouhy
- 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, University of Iowa Stead Family Children's Hospital
- 2Pappajohn Biomedical Institute, University of Iowa Carver College of Medicine; and
- 3Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, Iowa
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Antkowiak L, Rogalska M, Stogowski P, Anuszkiewicz K, Mandera M. Clinical Application of Diffusion Tensor Imaging in Chiari Malformation Type I- Advances and Perspectives. A Systematic Review. World Neurosurg 2021; 152:124-136. [PMID: 34147690 DOI: 10.1016/j.wneu.2021.06.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Diffusion tensor imaging (DTI) application in Chiari malformation type I (CMI) is still poorly defined. This study aimed to systematically review the literature and propose perspectives toward the clinical application of DTI in CMI. METHODS PubMed and Embase were searched for English-language articles published until October 20, 2020. Clinical studies and case series, evaluating fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), or radial diffusivity values in patients with CMI, were included. RESULTS Eight articles were included. Lower FA values were found at the syrinx level, which decreased with syrinx extent and intensity of symptoms, reflecting myelopathy severity. Decreased AD and MD in the middle cerebellar peduncles in symptomatic patients with CMI might explain the presence of cerebellar signs. Increased FA in various supratentorial structures positively correlated with pain severity. Worse performance in neuropsychological tests correlated with decreased FA, increased MD, and radial diffusivity, reflecting axonal degeneration. Postoperative FA decrease in the brainstem compression area reflects successful decompression. A positive correlation was found between the extent of tonsillar ectopia and increased FA, MD, and AD values, which could act as an early indicator of acute brainstem compression. CONCLUSIONS DTI might provide a valuable insight into the neurobiological foundation of symptomatic CMI presentation. The severity of white matter injury evident on DTI could serve as a reliable predictor of postoperative outcomes, therefore facilitating selection of appropriate surgical candidates. Postinterventional DTI reassessment might enable differentiation between unsuccessful surgical technique and irreversible myelopathy. The extent of tonsillar ectopia reflects the severity of microstructural brainstem injury.
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Affiliation(s)
- Lukasz Antkowiak
- Department of Pediatric Neurosurgery, Medical University of Silesia, Katowice, Poland.
| | - Marta Rogalska
- Faculty of Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Piotr Stogowski
- Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
| | | | - Marek Mandera
- Department of Pediatric Neurosurgery, Medical University of Silesia, Katowice, Poland
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Rare functional genetic variants in COL7A1, COL6A5, COL1A2 and COL5A2 frequently occur in Chiari Malformation Type 1. PLoS One 2021; 16:e0251289. [PMID: 33974636 PMCID: PMC8112708 DOI: 10.1371/journal.pone.0251289] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 04/24/2021] [Indexed: 11/19/2022] Open
Abstract
Chiari Malformation Type 1 (CM-1) is characterized by herniation of the cerebellar tonsils below the foramen magnum and the presence of headaches and other neurologic symptoms. Cranial bone constriction is suspected to be the most common biologic mechanism leading to CM-1. However, other mechanisms may also contribute, particularly in the presence of connective tissue disorders (CTDs), such as Ehlers Danlos Syndrome (EDS). Accumulating data suggest CM-1 with connective tissue disorders (CTD+) may have a different patho-mechanism and different genetic risk factors than CM-1 without CTDs (CTD-). To identify CM-1 genetic risk variants, we performed whole exome sequencing on a single large, multiplex family from Spain and targeted sequencing on a cohort of 186 unrelated adult, Caucasian females with CM-1. Targeted sequencing captured the coding regions of 21 CM-1 and EDS candidate genes, including two genes identified in the Spanish family. Using gene burden analysis, we compared the frequency of rare, functional variants detected in CM-1 cases versus publically available ethnically-matched controls from gnomAD. A secondary analysis compared the presence of rare variants in these genes between CTD+ and CTD- CM-1 cases. In the Spanish family, rare variants co-segregated with CM-1 in COL6A5, ADGRB3 and DST. A variant in COL7A1 was present in affected and unaffected family members. In the targeted sequencing analysis, rare variants in six genes (COL7A1, COL5A2, COL6A5, COL1A2, VEGFB, FLT1) were significantly more frequent in CM-1 cases compared to public controls. In total, 47% of CM-1 cases presented with rare variants in at least one of the four significant collagen genes and 10% of cases harbored variants in multiple significant collagen genes. Moreover, 26% of CM-1 cases presented with rare variants in the COL6A5 gene. We also identified two genes (COL7A1, COL3A1) for which the burden of rare variants differed significantly between CTD+ and CTD- CM-1 cases. A higher percentage of CTD+ patients had variants in COL7A1 compared to CTD+ patients, while CTD+ patients had fewer rare variants in COL3A1 than did CTD- patients. In summary, rare variants in several collagen genes are particularly frequent in CM-1 cases and those in COL6A5 co-segregated with CM-1 in a Spanish multiplex family. COL6A5 has been previously associated with musculoskeletal phenotypes, but this is the first association with CM-1. Our findings underscore the contribution of rare genetic variants in collagen genes to CM-1, and suggest that CM-1 in the presence and absence of CTD symptoms is driven by different genes.
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Voutsas G, St-Laurent A, Hutchinson C, Amin R, Drake J, Narang I. The efficacy of neurosurgical intervention on sleep-disordered breathing in pediatric patients with Chiari malformation type I. J Neurosurg Pediatr 2021; 27:611-619. [PMID: 33892471 DOI: 10.3171/2020.11.peds20574] [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: 06/26/2020] [Accepted: 11/09/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Chiari malformation type I (CM-I) involves the herniation of the cerebellar tonsils through the foramen magnum. CM-I is associated with both obstructive sleep apnea (OSA) and central sleep apnea (CSA) in children. The primary management of symptomatic CM-I remains surgical decompression. There is, however, a paucity of data evaluating the efficacy of decompression surgery on outcomes related to sleep-disordered breathing (SDB). The objective of this study was to evaluate SDB outcomes, specifically the need for respiratory support following decompression in pediatric patients with CM-I. METHODS This was a retrospective chart review of all children diagnosed with CM-I when younger than 18 years of age who had polysomnography (PSG) studies pre- and postsurgery, between January 2008 and October 2018 at the Hospital for Sick Children in Toronto. Patient demographics, symptoms, PSG data, ongoing respiratory support, and surgical notes were recorded. Differences in PSG studies obtained pre- and postsurgery were compared using the Wilcoxon test for paired samples. RESULTS A total of 15 children with 15 interventions met inclusion criteria with pre- and postsurgery PSG studies and were considered for statistical analysis. Of the 15 subjects included for analysis, preoperative OSA was present in 2 (13.3%), CSA in 5 (33.3%), mixed SDB (both OSA and CSA) in 4 (26.7%), and no significant SDB in 4 (26.7%). Postoperatively, OSA was present in 3 (20.0%), CSA in 4 (26.7%), mixed SDB in 0 (0%), and no significant SDB in 8 (53.3%). The presence of severe OSA decreased from 4/15 (26.7%) to 2/15 (13.3%) postoperatively, and severe CSA decreased from 5/15 (33.3%) to 2/15 (13.3%) postoperatively. Following decompression surgery, 7/15 subjects (46.7%) required positive airway pressure for management of their SDB. Overall, significant improvements were observed in a number of respiratory parameters following decompression including the following: the total apnea-hypopnea index (AHI) (17.5 ± 48.2 vs 6.1 ± 32.7 events/hour; p = 0.001), obstructive AHI (2.1 ± 16.1 vs 1.0 ± 6.6 events/hour; p = 0.005), central AHI (6.3 ± 48.9 vs 2.7 ± 33.0 events/hour; p = 0.005), and the desaturation index (16.7 ± 49.6 vs 3.8 ± 25.3; p = 0.001). CONCLUSIONS Although decompression surgery led to a significant reduction in obstructive and central events, many children continued to have persistent SDB and required additional positive airway pressure therapy. This information is important and relevant for anticipatory guidance around decompression surgery and the necessity for respiratory support for the management of SDB in pediatric patients with CM-I.
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Affiliation(s)
- Giorge Voutsas
- 1Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario.,2University of Toronto, Ontario
| | | | - Crystal Hutchinson
- 1Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario
| | - Reshma Amin
- 2University of Toronto, Ontario.,4Division of Respiratory Medicine, Hospital for Sick Children, Toronto, Ontario; and
| | - James Drake
- 2University of Toronto, Ontario.,5Division of Neurosurgery, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Indra Narang
- 1Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, Ontario.,2University of Toronto, Ontario.,4Division of Respiratory Medicine, Hospital for Sick Children, Toronto, Ontario; and
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Natural history of Chiari I malformation in children: a retrospective analysis. Childs Nerv Syst 2021; 37:1185-1190. [PMID: 33009607 DOI: 10.1007/s00381-020-04913-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE While there are increasing numbers of studies published regarding Chiari I malformation (CM1) in children, most of these focus on surgical indications, technique, and outcomes. Few studies examine the natural history of CM1 once the decision is made to treat a patient conservatively. In this study, we seek to determine the percentage of pediatric patients who undergo surgery for CM1, both after initial consultation and in a delayed fashion, the natural history of CM1 after a decision to pursue non-operative management, and attempt to identify patient factors that may predict development of new or worsening CM1 symptoms. METHODS From our database of 465 pediatric patients with CM1, we identified those who were seen for initial consultation from July 1, 2011, to June 30, 2016. We examined rates of surgical intervention, types of surgical intervention, age, gender, and presence or absence of headache and syrinx, and looked carefully at the patients who had new or worsening symptoms prompting delayed surgical intervention. RESULTS We identified 226 patients meeting inclusion criteria. Overall, 15% of patients had surgery, the majority being Chiari decompression. Just over half of these patients had surgery within 6 months of initial consultation. Of those with delayed surgery, only 4 patients had new symptoms/syrinx and 1 patient had symptom progression. The other patients had various reasons for surgical delay not related to symptom development or progression. There were no obvious commonalities among these 5 patients that could predict progression prospectively. All patients who had surgery did so within 2 years of initial consultation. CONCLUSION Overall, the natural history of asymptomatic CM1 is benign. Patients treated non-operatively are unlikely to progress. If they do progress, this is likely to occur within 2 years of initial consultation. There were no factors identified in this study that predicted new or worsening symptoms over time.
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Long-term outcomes for children with an incidentally discovered Chiari malformation type 1: what is the clinical significance? Childs Nerv Syst 2021; 37:1191-1197. [PMID: 33230572 DOI: 10.1007/s00381-020-04980-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/18/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Chiari malformation type 1 (CM1) is an increasingly common incidental finding on magnetic resonance imaging (MRI). The proportion of children with an incidentally discovered CM1 who upon further evaluation require operative intervention for previously unrecognized signs and symptoms of neurological compromise or significant radiographic findings (syringomyelia) is unclear. An extensive long-term single-institution patient series was evaluated to better clarify the likelihood of surgery in patients who present with an incidentally discovered CM1. METHODS This study was conducted using prospective data for patients up to 18 years old that were evaluated for a CM1 at a large tertiary pediatric neurosurgery clinic between February 2009 and June 2019. Patients were excluded if they did not have an incidentally discovered CM1 and at least 12 months of clinical follow-up. RESULTS A total of 218 consecutive patients were included in this study. The mean age at the initial neurosurgical evaluation was 6.5 years (range 5 months to 18.4 years), and the mean duration of clinical follow-up was 40.6 months (range 12 to 114 months). Initial MR imaging was most commonly obtained for the evaluation of seizures (15.1%), nonspecific headaches (not occipital or tussive) (14.7%), trauma (9.6%), and developmental delay (7.8%). Of the patients studied that eventually required surgery, we identified two groups: those operated before 6 months since presentation and those operated after 6 months. A total of 36 patients (16.5%) underwent a decompression with 22 patients (61.1%) receiving surgery within 6 months and the remaining 14 patients (38.9%) beyond 6 months. Patients undergoing early surgery (10.1%) initially presented with a significant syrinx or were noted to have an occult neurological dysfunction, whereas a smaller subset of patients (6.4%) eventually required surgery over time due to the development of new symptoms or a de novo syrinx. Only the presence of syringomyelia was statistically significant for the need of a surgical intervention, while age, sex and degree of tonsillar herniation were not. CONCLUSION Evaluation of a large group of patients with an incidentally discovered Chiari malformation demonstrated that most patients may be managed conservatively, especially in the absence of syringomyelia. However, there is a subset of patients who will go on to develop a de novo syrinx or neurological symptoms that are new or progressive during follow-up, which should be evaluated by imaging of the brain and spinal cord. The presence of syringomyelia was associated with need for early surgical intervention. However, for patients without syringomyelia, surgical intervention is uncommon but may be delayed up to several years after presentation; therefore, long-term clinical follow-up is recommended.
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