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Zarrin D, Goel K, Kim WJ, Holly LT, Batzdorf U. Chiari Type I Revision Decompressive Surgery Indications and Operative Technique: Experience in a Large Adult Cohort. World Neurosurg 2024; 185:e1074-e1085. [PMID: 38490446 DOI: 10.1016/j.wneu.2024.03.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Chiari malformation is characterized by inferior displacement of the cerebellar tonsils through the foramen magnum, frequently resulting in strain related headaches, and motor/sensory dysfunction. Chiari decompression technique varies significantly, possibly contributing to frequent revisions. We reviewed revision Chiari decompressions at our institution to determine the primary indications for revision and outcomes after revision. METHODS We retrospectively reviewed patients who underwent revision of Chiari decompression at our institution from 2005 to 2020. Demographics, indications for revision surgery, operative techniques, imaging findings, and preoperative/postoperative symptoms were collected. χ2 test was performed to determine statistical significance using a P < 0.05. Independent predictors of operative outcomes were identified. RESULTS A total of 46 patients (91% females, mean age 38.8 years) were included for analysis. The median time to revision surgery was 69.1 months (range 0-364 months) with headache (n = 37, 80%) being the most commonly recurring symptom. Large craniectomy (n = 28, 61%) was the most frequent indication for revision surgery. Thirty-two (70%) patients underwent cranioplasty, 20 (43%) required duraplasty, 15 (33%) required arachnoid dissection, and 15 (33%) required tonsillar reduction during revision surgery. Postrevision follow-up (at 8.9 ± 5.2 months average, range 1-18 months), revealed an average reduction in all Chiari-related symptoms relative to symptoms before the revision. CONCLUSIONS The most common indication for revision Chiari decompression was a large craniectomy resulting in cerebellar ptosis. We found that tonsillar reduction paired with modest craniectomy achieved near-complete resolution of symptoms with minimal complications. For patients with recurrent or persistent sequelae of Chiari malformation after decompression, revision may reduce symptom severity.
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Affiliation(s)
- David Zarrin
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Keshav Goel
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Wi Jin Kim
- Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California, USA
| | - Langston T Holly
- Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California, USA
| | - Ulrich Batzdorf
- Department of Neurosurgery, University of California, Los Angeles, Los Angeles, California, USA.
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Onafowokan OO, Das A, Mir JM, Alas H, Williamson TK, Mcfarland K, Varghese J, Naessig S, Imbo B, Passfall L, Krol O, Tretiakov P, Joujon-Roche R, Dave P, Moattari K, Owusu-Sarpong S, Lebovic J, Vira S, Diebo B, Lafage V, Passias PG. Predictors of reoperation for spinal disorders in Chiari malformation patients with prior surgical decompression. JOURNAL OF CRANIOVERTEBRAL JUNCTION AND SPINE 2023; 14:336-340. [PMID: 38268684 PMCID: PMC10805163 DOI: 10.4103/jcvjs.jcvjs_140_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 11/10/2023] [Indexed: 01/26/2024] Open
Abstract
Background Chiari malformation (CM) is a cluster of related developmental anomalies of the posterior fossa ranging from asymptomatic to fatal. Cranial and spinal decompression can help alleviate symptoms of increased cerebrospinal fluid pressure and correct spinal deformity. As surgical intervention for CM increases in frequency, understanding predictors of reoperation may help optimize neurosurgical planning. Materials and Methods This was a retrospective analysis of the prospectively collected Healthcare Cost and Utilization Project's California State Inpatient Database years 2004-2011. Chiari malformation Types 1-4 (queried with ICD-9 CM codes) with associated spinal pathologies undergoing stand-alone spinal decompression (queried with ICD-9 CM procedure codes) were included. Cranial decompressions were excluded. Results One thousand four hundred and forty-six patients (29.28 years, 55.6% of females) were included. Fifty-eight patients (4.01%) required reoperation (67 reoperations). Patients aged 40-50 years had the most reoperations (11); however, patients aged 15-20 years had a significantly higher reoperation rate than all other groups (15.5% vs. 8.2%, P = 0.048). Female gender was significantly associated with reoperation (67.2% vs. 55.6%, P = 0.006). Medical comorbidities associated with reoperation included chronic lung disease (19% vs. 6.9%, P < 0.001), iron deficiency anemia (10.3% vs. 4.1%, P = 0.024), and renal failure (3.4% vs. 0.9%, P = 0.05). Associated significant cluster anomalies included spina bifida (48.3% vs. 34.8%, P = 0.035), tethered cord syndrome (6.9% vs. 2.1%, P = 0.015), syringomyelia (12.1% vs. 5.9%, P = 0.054), hydrocephalus (37.9% vs. 17.7%, P < 0.001), scoliosis (13.8% vs. 6.4%, P = 0.028), and ventricular septal defect (6.9% vs. 2.3%, P = 0.026). Conclusions Multiple medical and CM-specific comorbidities were associated with reoperation. Addressing them, where possible, may aid in improving CM surgery outcomes.
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Affiliation(s)
- Oluwatobi O. Onafowokan
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Ankita Das
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Jamshaid M. Mir
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Haddy Alas
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Tyler K. Williamson
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Kimberly Mcfarland
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | | | - Sara Naessig
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Bailey Imbo
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Lara Passfall
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Oscar Krol
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Peter Tretiakov
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Rachel Joujon-Roche
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Pooja Dave
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Kevin Moattari
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Stephane Owusu-Sarpong
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Jordan Lebovic
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
| | - Shaleen Vira
- Department of Orthopedic Surgery, Banner Health, Phoenix, AZ, USA
| | - Bassel Diebo
- Department of Orthopedic Surgery, Warren Alpert School of Medicine, Brown University, RI, USA
| | - Virginie Lafage
- Department of Orthopaedics, Lenox Hill Hospital, Northwell Health, New York, USA
| | - Peter Gust Passias
- Department of Orthopedic and Neurological Surgery, NYU Langone Orthopaedic Hospital, New York, USA
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Talamonti G, Picano M, Fragale M, Marcati E, Meccariello G, Boeris D, Cenzato M. Reoperation in Chiari-1 Malformations. J Clin Med 2023; 12:jcm12082853. [PMID: 37109192 PMCID: PMC10142814 DOI: 10.3390/jcm12082853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/05/2023] [Accepted: 04/09/2023] [Indexed: 04/29/2023] Open
Abstract
(1) Background: The issue of unsuccessful surgery for Chiari-1 malformation (CM-1), as well as its potential causes and possible solutions, remains poorly documented and studied. (2) Methods: From a retrospective review of a personal series of 98 patients undergoing treatment for CM-1 during the past 10 years, we created two study groups. Group 1: 8 patients (8.1%) requiring additional surgeries owing to postoperative complications (7 cerebrospinal fluid leakage, 1 extradural hematoma); 7 patients (7.1%) undergoing reoperations for failed decompression during the follow-up. Group 2: During the same period, we also managed 19 patients who had previously been operated on elsewhere: 8 patients who required adequate CM-1 treatment following extradural section of the filum terminale; 11 patients requiring reoperations for failed decompression. Failed decompression was managed by adequate osteodural decompression, which was associated with tonsillectomy (6 cases), subarachnoid exploration (8 cases), graft substitution (6 cases), and occipito-cervical fixation/revision (1 case). (3) Results: There was no mortality or surgical morbidity in Group 1. However, one patient's condition worsened due to untreatable syrinx. In Group 2, there were two cases of mortality, and surgical morbidity was represented by functional limitation and pain in the patient who needed revision of the occipitocervical fixation. Twenty patients improved (58.8%), 6 remained unchanged (32.3%), 1 worsened (2.9%) and 2 died (5.9%). (4) Conclusions: The rate of complications remains high in CM-1 treatment. Unfortunately, a certain rate of treatment failure is unavoidable, but it appears that a significant number of re-operations could have been avoided using proper indications and careful technique.
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Affiliation(s)
| | - Marco Picano
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
| | - Maria Fragale
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
- La Sapienza, University of Rome, 00185 Rome, Italy
| | | | | | - Davide Boeris
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
| | - Marco Cenzato
- Department of Neurosurgery, ASST Niguarda, 20162 Milan, Italy
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Venkatakrishna SSB, McClure ME, Andronikou S. Natural History of Chiari 1 Deformity. J Comput Assist Tomogr 2023; 47:301-306. [PMID: 36728736 DOI: 10.1097/rct.0000000000001404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE Chiari type 1 deformity (Ch1) is associated with bony deformity of the skull base and herniation of cerebellar tonsils more than 5 mm below the foramen magnum. Magnetic resonance imaging (MRI) is used for diagnosis and surgery is advised for symptomatic children. We present a case series using MRI including cerebrospinal fluid (CSF) flow, in children with Ch1 to demonstrate a variety of outcomes, both surgical and spontaneous: spontaneous resolution, spontaneous worsening, postsurgical improvement, and postsurgical deterioration. CASE A 2-week-old female newborn underwent brain MRI demonstrating an ectopic neurohypophysis, under opercularization suggesting brain immaturity and a normal craniocervical junction (CCJ). Follow-up (F/U) MRI at 6 years of age showed interval spontaneous development of Ch1 with decreased CSF spaces at CCJ. CASE A 6-year-old girl referred for imaging with short stature and growth hormone deficiency demonstrated incidental findings of Ch1 without syringomyelia. There was 15-mm protrusion of pointed cerebellar tonsils through the foramen magnum and a reduced CSF space at the craniocervical junction. No surgery was performed, and F/U MRI at the age of 7 years demonstrated spontaneous resolution of the tonsillar ectopia (cerebellar tonsils now 3 mm right and 6 mm left) and expansion of the CSF spaces at CCJ. CASE A 7-year-old boy with headaches and staring spells underwent an MRI demonstrating 6-mm protrusion of pointed cerebellar tonsils and CSF space reduction at CCJ. No surgery was performed, and F/U imaging at the age of 9 years demonstrated spontaneous improvement in cerebellar tonsillar position and increased bidirectional CSF flow at CCJ. CASE A 17-month-old boy underwent brain MRI for unsteady gait and poor vestibular response, which showed Ch1 and narrow CSF spaces at the foramen magnum and with reduced CSF flow. At the age of 3 years, after posterior fossa decompression, F/U MRI showed postsurgical improvement of the position of the cerebellar tonsils and increased CSF space at CCJ. CASE A 4-month-old male infant with a history of 34-week prematurity, prior germinal matrix hemorrhage, and neonatal subdural hemorrhage was referred for MRI of the cervical and thoracic spine for evaluation of developmental delay and hypotonia with torticollis. Magnetic resonance imaging of the spine demonstrated mild protrusion of inferiorly pointed cerebellar tonsils up to the foramen magnum, with visible CSF and without retroflexion of the dens. Follow-up MRI scans demonstrated progressive worsening of the Chiari 1 deformity, even after multiple surgeries. CONCLUSIONS It is important to be aware of a variety of different outcomes with Ch1, including spontaneous resolution, spontaneous worsening, improvement with surgery, and even deterioration after surgery. More research is required to determine objective criteria for predicting outcome, which include both anatomic measures and physiologic measures of CSF flow, so that better surgical decisions can be made and for evaluating patients who have undergone surgery.
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Affiliation(s)
| | - Meghan E McClure
- From the Department of Radiology, Children's Hospital of Philadelphia
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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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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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