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Friedlander RM. Congenital and Acquired Chiari Syndrome. N Engl J Med 2024; 390:2191-2198. [PMID: 38899696 DOI: 10.1056/nejmra2308055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Affiliation(s)
- Robert M Friedlander
- From the Department of Neurological Surgery, University of Pittsburgh School of Medicine, University of Pittsburgh Medical Center, Pittsburgh
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2
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Marcelli V, Giannoni B, Volpe G, Faralli M, Fetoni AR, Pettorossi VE. Downbeat nystagmus: a clinical and pathophysiological review. Front Neurol 2024; 15:1394859. [PMID: 38854962 PMCID: PMC11157062 DOI: 10.3389/fneur.2024.1394859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 04/29/2024] [Indexed: 06/11/2024] Open
Abstract
Downbeat nystagmus (DBN) is a neuro-otological finding frequently encountered by clinicians dealing with patients with vertigo. Since DBN is a finding that should be understood because of central vestibular dysfunction, it is necessary to know how to frame it promptly to suggest the correct diagnostic-therapeutic pathway to the patient. As knowledge of its pathophysiology has progressed, the importance of this clinical sign has been increasingly understood. At the same time, clinical diagnostic knowledge has increased, and it has been recognized that this sign may occur sporadically or in association with others within defined clinical syndromes. Thus, in many cases, different therapeutic solutions have become possible. In our work, we have attempted to systematize current knowledge about the origin of this finding, the clinical presentation and current treatment options, to provide an overview that can be used at different levels, from the general practitioner to the specialist neurologist or neurotologist.
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Affiliation(s)
- Vincenzo Marcelli
- Audiology and Vestibology Unit, Department of ENT, Ospedale del Mare, ASL Napoli 1 Centro, Napoli, Italy
- Department of Neuroscience, Reproductive Science and Dentistry, Section of Audiology, University of Naples ‘’Federico II’’, Napoli, Italy
| | - Beatrice Giannoni
- Department of Neuroscience, Psychology, Drug’s Area and Child’s Health, University of Florence, Florence, Italy
| | - Giampiero Volpe
- Department of Neurology, Ospedale San Luca di Vallo della Lucania, ASL Salerno, Salerno, Italy
| | - Mario Faralli
- Department of ENT, University of Perugia, Perugia, Italy
- Department of Medicine and Surgery, University of Perugia, Perugia, Italy
| | - Anna Rita Fetoni
- Department of Neuroscience, Reproductive Science and Dentistry, Section of Audiology, University of Naples ‘’Federico II’’, Napoli, Italy
| | - Vito E. Pettorossi
- Department of Medicine and Surgery, University of Perugia, Perugia, Italy
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3
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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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4
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Famili HP, Zalewski CK, Ibrahimy A, Mack J, Cantor F, Heiss JD, Brewer CC. Audiovestibular Findings in a Cohort of Patients with Chiari Malformation Type I and Dizziness. J Clin Med 2023; 12:jcm12082767. [PMID: 37109107 PMCID: PMC10142081 DOI: 10.3390/jcm12082767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/17/2023] [Accepted: 03/21/2023] [Indexed: 04/29/2023] Open
Abstract
Chiari Malformation Type I (CM1) is a neurological condition in which the cerebellar tonsils extend past the foramen magnum. While many studies have reported dizziness symptoms in patients with CM1, the prevalence of peripheral labyrinthine lesions is largely unknown. This study aimed to comprehensively describe the audiovestibular phenotype in a cohort of patients with CM1 expressly referred for dizziness. Twenty-four patients with CM1 and a complaint of dizziness/vertigo were evaluated. Hearing and auditory brainstem tract function were essentially normal. While vestibular abnormalities were most prevalent during rotational testing (33%), abnormal functional balance was the most common finding (40%). Patients with CM1 had a greater likelihood of exhibiting an abnormal sensory organization test (SOT) postural stability score for fixed platform conditions, and for the somatosensory analysis score. While no significant associations were identified between tonsillar ectopia extent and any vestibular/balance outcome measure, a significant negative association was identified between neck pain and the somatosensory sensory analysis score. Abnormal functional balance in the somatosensory domain was remarkable, with poorer scores associated with neck pain. An isolated peripheral vestibulopathy was present in only 8% of patients. Despite the low prevalence of vestibulopathy, vestibular/balance assessment is warranted to identify patients who may benefit from referral to specialized medical disciplines.
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Affiliation(s)
- Hannah P Famili
- Audiology Unit, NIDCD, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | | | - Alaaddin Ibrahimy
- Surgical Neurology Branch, NINDS, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jessica Mack
- Surgical Neurology Branch, NINDS, National Institutes of Health, Bethesda, MD 20892, USA
| | - Fredric Cantor
- Surgical Neurology Branch, NINDS, National Institutes of Health, Bethesda, MD 20892, USA
| | - John D Heiss
- Surgical Neurology Branch, NINDS, National Institutes of Health, Bethesda, MD 20892, USA
| | - Carmen C Brewer
- Audiology Unit, NIDCD, National Institutes of Health, Bethesda, MD 20892, USA
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5
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Ling X, Wu YX, Feng YF, Zhao TT, Zhao GP, Kim JS, Yang X, Wang ZX. Spontaneous nystagmus with an upbeat component: Central or peripheral vestibular disorders? Front Neurol 2023; 14:1106084. [PMID: 36908595 PMCID: PMC9995393 DOI: 10.3389/fneur.2023.1106084] [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: 11/23/2022] [Accepted: 02/06/2023] [Indexed: 02/25/2023] Open
Abstract
Objective To determine the topical diagnosis and etiologies of spontaneous nystagmus (SN) with an upbeat component. Methods We retrospectively recruited 43 patients with SN with an upbeat component at a university hospital in China from 2020 to 2022. SN with an upbeat component was divided into pure upbeat nystagmus (UBN), SN with a predominant upbeat component, and SN with a non-predominant upbeat component. We analyzed their clinical and neurotologic findings and the final diagnosis. Results Fourteen (32.6%) of them showed pure UBN, while 29 (67.4%) exhibited SN mixed with an upbeat component, mixed upbeat-horizontal in 15, mixed upbeat-horizontal-torsional in 13, and upbeat-torsional in the remaining one. Pure UBN and SN with a predominant upbeat component were more common in central than in peripheral vestibular disorders [16 (80.0%) vs. 0 (0%), Chi-Square test, p < 0.001]. Central vestibular disorders were diagnosed in 20 (46.5%) patients, peripheral in 14 (32.6%), and undetermined in nine (20.9%) patients. The underlying causes mainly included acute unilateral peripheral vestibulopathy (n = 11), posterior circulation infarction (n = 9), benign recurrent vertigo (n = 4), vestibular migraine (VM, n = 3), and VM of childhood (n = 2). Conclusion SN with an upbeat component can be seen in both central and peripheral vestibular disorders. Pure UBN was a characteristic sign of central vestibular dysfunction. Central vestibular disorders should be highly suspected when patients show pure UBN or SN with a predominant upbeat component.
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Affiliation(s)
- Xia Ling
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Yue-Xia Wu
- Department of Neurology, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, China
| | - Yu-Fei Feng
- Department of Neurology, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, China
| | - Tong-Tong Zhao
- Department of Neurology, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, China
| | - Gui-Ping Zhao
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Ji-Soo Kim
- Research Administration Team, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.,Dizziness Center, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Xu Yang
- Department of Neurology, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, Beijing, China
| | - Zhao-Xia Wang
- Department of Neurology, Peking University First Hospital, Beijing, China
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6
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Case Report: Downbeat Nystagmus Due to Epidural Puncture during Labor with Undiagnosed Arnold Chiari Malformation. Optom Vis Sci 2022; 99:721-724. [PMID: 35678639 DOI: 10.1097/opx.0000000000001916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
SIGNIFICANCE Epidural anesthesia is a safe procedure used in pregnant patients during labor. However, caution should be exercised in those patients that have concurrent Arnold Chiari malformation. PURPOSE To report a rare and atypical presentation of downbeat nystagmus, in a pregnant patient with Arnold Chiari malformation type 1 (ACM1), secondary to accidental dural puncture. CASE REPORT A 31-year-old African American female presented with a chief complaint of decreased vision and oscillopsia that occurred after giving birth, six months earlier. Her medical history prior to presentation was unremarkable. Her delivery was typical; however, the patient did receive epidural anesthesia which resulted in a dural puncture. The patient noted her symptoms a few days after delivery. Upon examination, persistent down beat nystagmus was noted in both eyes. Magnetic resonance imaging revealed a 2.5 cm inferior displacement of the cerebellar tonsils below the foramen magnum consistent with ACM1. The patient was referred to neurosurgery for posterior fossa decompression. However, surgery was deferred until appropriate weight reduction could be achieved. Follow-up examination six months later revealed no change in her clinical findings. CONCLUSIONS This case report highlights an atypical presentation of downbeat nystagmus secondary to an accidental dural puncture in a pregnant patient with undiagnosed ACM1. Clinicians should consider the importance of considering ocular complications that can occur in pregnant patients with ACM1. Questioning of women who have recently given birth about epidural anesthesia should be considered with an acute presentation of downbeat-nystagmus.
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7
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Stella I, Remen T, Petel A, Joud A, Klein O, Perrin P. Postural control in Chiari I malformation: protocol for a paediatric prospective, observational cohort - potential role of posturography for surgical indication. BMJ Open 2022; 12:e056647. [PMID: 35551083 PMCID: PMC9109102 DOI: 10.1136/bmjopen-2021-056647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION Chiari I malformation (CM1) is an anatomical abnormality characterised by the cerebellar tonsils descending at least 5 mm below the foramen magnum. CM1 causes obstruction of cerebrospinal fluid (CSF) circulation as well as direct compression on the brainstem, thus causing typical consequences (syringomyelia), and typical clinical features (characteristic headaches and neurological impairment). Surgery is the only available treatment, indicated when symptomatology is present. However, sometimes patients have atypical complaints, which are often suggestive of otolaryngological (ears, nose and throat, ENT) involvement. This may be difficult for a neurosurgeon to explain. Our study aims to investigate the relationship between one of these atypical symptoms, for example, postural instability, in a paediatric population using a Computerised Dynamic Posturography (Equitest, NeuroCom, Clackamas, OR). To our knowledge, there are no previously published studies carried out on children with CM1, using dynamic posturography. METHODS AND ANALYSIS Forty-five children aged 6-18 years old presenting with radiologically confirmed CM1 and presenting ENT clinical complaints will be included in the study for a duration of 3 years. As primary endpoint, posturographic results will be described in the population study. Second, posturographic results will be compared between patients with and without indication for surgery. Finally, preoperative and postoperative posturographic results, as well as CSF circulation quality at foramen magnum level, syringomyelia, sleep apnoea syndrome, scoliosis and behaviour will be compared in the operated patient group. ETHICS AND DISSEMINATION This protocol received ethical approval from the Clinical Research Delegation of Nancy University Hospital, in accordance with the National Commission on Informatics and Liberties (Commission Nationale de l'Informatique et des Libertés) (protocol number 2019PI256-107). Our data treatment was in accordance with the Methodology of reference Methodology Reference-004 specification for data policy. The study findings will be disseminated via peer-reviewed publications and conference presentations, especially to the Neurosphynx's rare disease healthcare network. TRIAL REGISTRATION NUMBER NCT04679792; Pre-results.
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Affiliation(s)
- Irene Stella
- EA 3450 DevAH - Development, Adaptation and Handicap, Faculty of Medicine, University of Lorraine, Nancy, France
- Paediatric Neurosurgery, CHRU de Nancy, Nancy, France
- Laboratory for the Analysis of Posture, Equilibrium and Motor Function (LAPEM), CHRU de Nancy, Nancy, France
| | - Thomas Remen
- Methodologic, Data-Management and Statistics Unit, CHRU de Nancy, Nancy, France
| | - Arthur Petel
- EA 3450 DevAH - Development, Adaptation and Handicap, Faculty of Medicine, University of Lorraine, Nancy, France
- Laboratory for the Analysis of Posture, Equilibrium and Motor Function (LAPEM), CHRU de Nancy, Nancy, France
| | - Anthony Joud
- Paediatric Neurosurgery, CHRU de Nancy, Nancy, France
| | - Olivier Klein
- EA 3450 DevAH - Development, Adaptation and Handicap, Faculty of Medicine, University of Lorraine, Nancy, France
- Paediatric Neurosurgery, CHRU de Nancy, Nancy, France
- Laboratory for the Analysis of Posture, Equilibrium and Motor Function (LAPEM), CHRU de Nancy, Nancy, France
| | - Philippe Perrin
- EA 3450 DevAH - Development, Adaptation and Handicap, Faculty of Medicine, University of Lorraine, Nancy, France
- Laboratory for the Analysis of Posture, Equilibrium and Motor Function (LAPEM), CHRU de Nancy, Nancy, France
- Paediatric Oto-Rhyno-laryngology, CHRU de Nancy, Na, Nancy, France
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8
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Pingree GM, Fleming C, Reavey-Cantwell J, Coelho DH. Neurosurgical Causes of Pulsatile Tinnitus: Contemporary Update. Neurosurgery 2022; 90:161-169. [PMID: 34995248 DOI: 10.1227/neu.0000000000001778] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/31/2021] [Indexed: 12/15/2022] Open
Abstract
Traditionally in the domain of the otolaryngologist, pulsatile tinnitus (PT) has become increasingly relevant to neurosurgeons. PT may prove to be a harbinger of life-threatening pathology; however, often, it is a marker of a more benign process. Irrespectively, the neurosurgeon should be familiar with the many potential etiologies of this unique and challenging patient population. In this review, we discuss the myriad causes of PT, categorized by pulse-phase rhythmicity.
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Affiliation(s)
- Graham M Pingree
- Department of Otolaryngology - Head & Neck Surgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Charles Fleming
- Department of Neurosurgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - John Reavey-Cantwell
- Department of Neurosurgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Daniel H Coelho
- Department of Otolaryngology - Head & Neck Surgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
- Department of Neurosurgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
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9
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Tran TM, Lee MS, McClelland CM. Downbeat nystagmus: a clinical review of diagnosis and management. Curr Opin Ophthalmol 2021; 32:504-514. [PMID: 34456290 DOI: 10.1097/icu.0000000000000802] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW This review will extensively cover the clinical manifestations, causes, diagnostic evaluation, and management strategies of downbeat nystagmus (DBN). RECENT FINDINGS Historically, MRI to assess for structural lesions at the cervicomedullary junction has been the primary diagnostic test in the evaluation of DBN since the 1980s. In recent years, there is increasing awareness of nonstructural causes of DBN including gluten ataxia, nutritional deficiencies, and paraneoplastic syndromes, among others. Medical management with aminopyridines has become first-line therapy in addition to disease-specific therapies. SUMMARY DBN is a common form of acquired nystagmus and the differential diagnosis remains broad, including both benign and potentially fatal causes. For practical purposes, the causes can be categorized as structural vs. nonstructural with MRI as the ideal, initial diagnostic study to differentiate the two. General therapeutic options include pharmacotherapy to enhance Purkinje cell function, strabismus surgery or prisms to shift null points, and behavioural changes. Disease-specific treatment is necessarily broad, though a significant proportion of patients will be idiopathic.
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Affiliation(s)
- Tu M Tran
- Department of Ophthalmology and Visual Neurosciences
| | - Michael S Lee
- Department of Ophthalmology and Visual Neurosciences
- Department of Neurology
- Department of Neurosurgery, University of Minnesota, Minneapolis, USA
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10
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Imaging and health metrics in incidental cerebellar tonsillar ectopia: findings from the Adolescent Brain Cognitive Development Study (ABCD). Neuroradiology 2021; 63:1913-1924. [PMID: 34247260 DOI: 10.1007/s00234-021-02759-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 06/27/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Incidental cerebellar tonsillar ectopia (ICTE) that meets the radiographic criterion for Chiari malformation type I (CMI) is an increasingly common finding in the clinical setting, but its significance is unclear. The present study examined posterior cranial fossa (PCF) morphometrics and a broad range of health instruments of pediatric ICTE cases and matched controls extracted from the Adolescent Brain Cognitive Development (ABCD) dataset. METHODS One-hundred-six subjects with ICTE and 106 matched controls without ICTE were identified from 11,411 anatomical MRI of healthy screened pediatric subjects from the ABCD project. Subjects were matched by sex, age, body mass index, race, and ethnicity. Twenty-two brain morphometrics and 22 health instruments were compared between the two groups to identify unrecognized CMI symptoms and assess the general health impact of ICTE. RESULTS Twelve and 15 measures were significantly different between the ICTE and control groups for females and males, respectively. Notably, for females, the anterior CSF space was significantly smaller (p = 0.00005) for the ICTE group than controls. For males, the clivus bone length was significantly shorter (p = 0.0002) for the ICTE group compared to controls. No significant differences were found among the 22 health instruments between the two groups. CONCLUSION This study demonstrated that pediatric ICTE subjects have similar PCF morphometrics to adult CMI. ICTE alone did not appear to cause any unrecognized CMI symptoms and had no impact on the subjects' current mental, physical, or behavioral health. Still, given their cranial and brain morphology, these cases may be at risk for adult-onset symptomatic CMI.
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Ciçek A, Cortier J, Hendrickx S, Van Cauwenbergh J, Calus L, Dehem J, Vanhauwaert D. Chiari Type I Malformation Presenting with Unilateral Hearing Loss. J Neurol Surg A Cent Eur Neurosurg 2021; 84:285-287. [PMID: 34100267 DOI: 10.1055/s-0041-1725959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Chiari type I malformations can present in different ways, but the most frequent symptom is an occipitocervical headache. Hearing loss as the main presenting symptom is rare. CASE A young woman with progressive left-sided unilateral hearing loss was diagnosed with a Chiari type I malformation. She underwent a suboccipital craniectomy with C1 laminectomy and duraplasty. The hearing loss had resolved postoperatively with normalization of the audiometry. CONCLUSION Chiari type I malformation can present solely with hearing loss. Improvement after surgical decompression is possible. This phenomenon is not emphasized well enough within the neurologic community. In this report, we present a summary of the pathophysiology and management in Chiari type I malformations.
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Affiliation(s)
- Abdulhamid Ciçek
- Department of Neurosurgery, AZ Delta, Roeselare, Belgium.,Department of Neurosurgery, Jan Yperman Hospital, Ypres, Belgium
| | - Jeroen Cortier
- Department of Neurosurgery, AZ Delta, Roeselare, Belgium
| | | | | | - Lien Calus
- Department of Ear, Nose and Throat Surgery, Jan Yperman Hospital, Ypres, Belgium
| | - Johan Dehem
- Department of Radiology, Jan Yperman Hospital, Ypres, Belgium
| | - Dimitri Vanhauwaert
- Department of Neurosurgery, AZ Delta, Roeselare, Belgium.,Department of Neurosurgery, Jan Yperman Hospital, Ypres, Belgium
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12
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Chiari I malformation-neuropsychological functions and quality of life. Acta Neurochir (Wien) 2020; 162:1575-1582. [PMID: 30955083 DOI: 10.1007/s00701-019-03897-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/28/2019] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To assess the neuropsychological (NP) functioning and quality of life (QOL) before and 3 months after surgery on adults with Chiari I malformation (CMI). PATIENTS AND METHODS All adult patients who had been diagnosed with CMI were invited to participate. Those who participated were assessed using a Hospital Anxiety and Depression scale (HAD) and NP examinations. Their QOL was assessed using the self-reported life satisfaction checklist, LiSat-11 and the five-dimensional EuroQol measurement of health outcome, EQ-5D-5L. All assessments were carried out both before and 3 months after surgery was performed. Demographic data and comorbidities were also registered. RESULTS Of the 11 patients who underwent NP assessment, the majority demonstrated cognitive functioning within the normal range. However, postoperatively, their performance in verbal learning, psychomotor speed, colour naming speed and the ability to manage interference through response selection and inhibition (aspects of executive functioning) was significantly improved. Thirteen patients completed QOL assessments. When LiSat-11 item domains were compared with those of healthy subjects, patients reported a lower level of satisfaction with their life quality both before and after surgery. However, the EQ-5D-5L measurements, i.e., the descriptive system and the visual analogue, indicated that their QOL of life was significantly improved after surgery. CONCLUSION There is scarcely any literature documenting effects of surgery on the QOL of CMI patients. The study we present here breaks new ground by comparing pre- and postoperative NP functions in CMI. We also examine the value of surgery for improving both NP functions and QOL in CMI.
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Kim SH, Kim HJ, Kim JS. Perverted Downward Corrective Saccades During Horizontal Head Impulses in Chiari Malformation. THE CEREBELLUM 2019; 18:333-339. [PMID: 30610539 DOI: 10.1007/s12311-018-1000-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The mechanism of perverted vertical responses during horizontal head impulse tests (HITs) requires further elucidation. A 47-year-old woman with a Chiari malformation showed alternating skew deviation, downbeat nystagmus with an increasing slow phase velocity, impaired smooth pursuit, and upward ocular deviation during horizontal HITs and corrective downward saccades in the presence of normal bithermal caloric tests and intact tilt suppressions of the post-rotatory nystagmus. These findings suggest dysfunction of the inferior cerebellum including the tonsil, nodulus, and uvula. We propose that disruption of signals from the medial part of the vestibulocerebellum, which normally inhibits the lateral and anterior canal pathways, may elicit an upward misdirection of the eye velocity during rapid horizontal head rotation. Otherwise, the Chiari malformation may have directly affected the brainstem structures involved in the direction matrix of the vestibulo-ocular reflex.
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Affiliation(s)
- Sung-Hee Kim
- Department of Neurology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, South Korea
| | - Hyo-Jung Kim
- Research Administration Team, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Ji-Soo Kim
- Department of Neurology, Seoul National University College of Medicine, Seoul, South Korea. .,Dizziness Center, Clinical Neuroscience Center, and Department of Neurology, Seoul National University Bundang Hospital, 173-82 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, South Korea.
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14
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Bolognese PA, Brodbelt A, Bloom AB, Kula RW. Chiari I Malformation: Opinions on Diagnostic Trends and Controversies from a Panel of 63 International Experts. World Neurosurg 2019; 130:e9-e16. [PMID: 31121369 DOI: 10.1016/j.wneu.2019.05.098] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/10/2019] [Accepted: 05/11/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND Chiari I malformation (CMI) and the topics concerning it have been the subject of numerous discussions and polarizing controversies over the course of the last 20 years. METHODS The opinions of 63 recognized international CMI experts from 4 continents, with a collective surgical experience of >15,000 CMI cases, were gathered through a detailed questionnaire. RESULTS Three facts emerged from the analysis of the results: 1) Most of the replies showed a high level of consensus on most CMI-related topics. 2) Several topics, which had been considered controversial as recently as 10 years ago, are now more widely accepted. 3) The so-called 5-mm rule was rejected by 88.5% of the CMI experts who responded to the questionnaire. CONCLUSIONS Sixty three recognized international CMI experts from 4 continents, with a collective surgical experience of >15,000 CMI cases were polled about a number of CMI topics. The results showed a high level of consensus, as well as a paradigm shift.
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Affiliation(s)
| | - Andrew Brodbelt
- The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom
| | | | - Roger W Kula
- Chiari Neurosurgical Center, Lake Success, New York, USA
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Goldschagg N, Feil K, Ihl F, Krafczyk S, Kunz M, Tonn JC, Strupp M, Peraud A. Decompression in Chiari Malformation: Clinical, Ocular Motor, Cerebellar, and Vestibular Outcome. Front Neurol 2017; 8:292. [PMID: 28690584 PMCID: PMC5479925 DOI: 10.3389/fneur.2017.00292] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 06/06/2017] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Treatment of Chiari malformation can include suboccipital decompression with resection of one cerebellar tonsil. Its effects on ocular motor and cerebellar function have not yet been systematically examined. OBJECTIVE To investigate whether decompression, including resection of one cerebellar tonsil, leads to ocular motor, vestibular, or cerebellar deficits. PATIENTS AND METHODS Ten patients with Chiari malformation type 1 were systematically examined before and after (1 week and 3 months) suboccipital decompression with unilateral tonsillectomy. The work-up included a neurological and neuro-ophthalmological examination, vestibular function, posturography, and subjective scales. Cerebellar function was evaluated by ataxia rating scales. RESULTS Decompression led to a major subjective improvement 3 months after surgery, especially regarding headache (5/5 patients), hyp-/dysesthesia (5/5 patients), ataxia of the upper limbs (4/5 patients), and paresis of the triceps and interosseal muscles (2/2 patients). Ocular motor disturbances before decompression were detected in 50% of the patients. These symptoms improved after surgery, but five patients had new persisting mild ocular motor deficits 3 months after decompression with unilateral tonsillectomy (i.e., smooth pursuit deficits, horizontally gaze-evoked nystagmus, rebound, and downbeat nystagmus) without any subjective complaints. Impaired vestibular (horizontal canal, saccular, and utricular) function improved in five of seven patients with impaired function before surgery. Posturographic measurements after surgery did not change significantly. CONCLUSION Decompression, including resection of one cerebellar tonsil, leads to an effective relief of patients' preoperative complaints. It is a safe procedure when performed with the help of intraoperative electrophysiological monitoring, although mild ocular motor dysfunctions were seen in half of the patients, which were fortunately asymptomatic.
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Affiliation(s)
- Nicolina Goldschagg
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Neurology, University Hospital Munich, Munich, Germany
| | - Katharina Feil
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Neurology, University Hospital Munich, Munich, Germany
| | - Franziska Ihl
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany
| | - Siegbert Krafczyk
- Department of Neurology, University Hospital Munich, Munich, Germany
| | - Mathias Kunz
- Department of Neurosurgery, University Hospital Munich, Munich, Germany
| | | | - Michael Strupp
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Neurology, University Hospital Munich, Munich, Germany
| | - Aurelia Peraud
- Department of Neurosurgery, University Hospital Munich, Munich, Germany
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16
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Bhattacharyya N, Gubbels SP, Schwartz SR, Edlow JA, El-Kashlan H, Fife T, Holmberg JM, Mahoney K, Hollingsworth DB, Roberts R, Seidman MD, Steiner RWP, Do BT, Voelker CCJ, Waguespack RW, Corrigan MD. Clinical Practice Guideline: Benign Paroxysmal Positional Vertigo (Update). Otolaryngol Head Neck Surg 2017; 156:S1-S47. [DOI: 10.1177/0194599816689667] [Citation(s) in RCA: 363] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Objective This update of a 2008 guideline from the American Academy of Otolaryngology—Head and Neck Surgery Foundation provides evidence-based recommendations to benign paroxysmal positional vertigo (BPPV), defined as a disorder of the inner ear characterized by repeated episodes of positional vertigo. Changes from the prior guideline include a consumer advocate added to the update group; new evidence from 2 clinical practice guidelines, 20 systematic reviews, and 27 randomized controlled trials; enhanced emphasis on patient education and shared decision making; a new algorithm to clarify action statement relationships; and new and expanded recommendations for the diagnosis and management of BPPV. Purpose The primary purposes of this guideline are to improve the quality of care and outcomes for BPPV by improving the accurate and efficient diagnosis of BPPV, reducing the inappropriate use of vestibular suppressant medications, decreasing the inappropriate use of ancillary testing such as radiographic imaging, and increasing the use of appropriate therapeutic repositioning maneuvers. The guideline is intended for all clinicians who are likely to diagnose and manage patients with BPPV, and it applies to any setting in which BPPV would be identified, monitored, or managed. The target patient for the guideline is aged ≥18 years with a suspected or potential diagnosis of BPPV. The primary outcome considered in this guideline is the resolution of the symptoms associated with BPPV. Secondary outcomes considered include an increased rate of accurate diagnoses of BPPV, a more efficient return to regular activities and work, decreased use of inappropriate medications and unnecessary diagnostic tests, reduction in recurrence of BPPV, and reduction in adverse events associated with undiagnosed or untreated BPPV. Other outcomes considered include minimizing costs in the diagnosis and treatment of BPPV, minimizing potentially unnecessary return physician visits, and maximizing the health-related quality of life of individuals afflicted with BPPV. Action Statements The update group made strong recommendations that clinicians should (1) diagnose posterior semicircular canal BPPV when vertigo associated with torsional, upbeating nystagmus is provoked by the Dix-Hallpike maneuver, performed by bringing the patient from an upright to supine position with the head turned 45° to one side and neck extended 20° with the affected ear down, and (2) treat, or refer to a clinician who can treat, patients with posterior canal BPPV with a canalith repositioning procedure. The update group made a strong recommendation against postprocedural postural restrictions after canalith repositioning procedure for posterior canal BPPV. The update group made recommendations that the clinician should (1) perform, or refer to a clinician who can perform, a supine roll test to assess for lateral semicircular canal BPPV if the patient has a history compatible with BPPV and the Dix-Hallpike test exhibits horizontal or no nystagmus; (2) differentiate, or refer to a clinician who can differentiate, BPPV from other causes of imbalance, dizziness, and vertigo; (3) assess patients with BPPV for factors that modify management, including impaired mobility or balance, central nervous system disorders, a lack of home support, and/or increased risk for falling; (4) reassess patients within 1 month after an initial period of observation or treatment to document resolution or persistence of symptoms; (5) evaluate, or refer to a clinician who can evaluate, patients with persistent symptoms for unresolved BPPV and/or underlying peripheral vestibular or central nervous system disorders; and (6) educate patients regarding the impact of BPPV on their safety, the potential for disease recurrence, and the importance of follow-up. The update group made recommendations against (1) radiographic imaging for a patient who meets diagnostic criteria for BPPV in the absence of additional signs and/or symptoms inconsistent with BPPV that warrant imaging, (2) vestibular testing for a patient who meets diagnostic criteria for BPPV in the absence of additional vestibular signs and/or symptoms inconsistent with BPPV that warrant testing, and (3) routinely treating BPPV with vestibular suppressant medications such as antihistamines and/or benzodiazepines. The guideline update group provided the options that clinicians may offer (1) observation with follow-up as initial management for patients with BPPV and (2) vestibular rehabilitation, either self-administered or with a clinician, in the treatment of BPPV.
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Affiliation(s)
- Neil Bhattacharyya
- Department of Otolaryngology, Harvard Medical School, Brigham and Women’s Hospital, Boston, Massachusetts, USA
| | - Samuel P. Gubbels
- Department of Otolaryngology, School of Medicine and Public Health, University of Colorado, Aurora, Colorado, USA
| | - Seth R. Schwartz
- Department of Otolaryngology, Virginia Mason Medical Center, Seattle, Washington, USA
| | - Jonathan A. Edlow
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Hussam El-Kashlan
- Department of Otolaryngology, University of Michigan, Ann Arbor, Michigan, USA
| | - Terry Fife
- Barrow Neurological Institute and College of Medicine, University of Arizona, Phoenix, Arizona, USA
| | | | | | | | - Richard Roberts
- Alabama Hearing and Balance Associates, Inc, Birmingham, Alabama, USA
| | - Michael D. Seidman
- Department of Otolaryngology–Head and Neck Surgery, College of Medicine, University of Central Florida, Orlando, Florida, USA
| | - Robert W. Prasaad Steiner
- Department of Health Management and Systems Science and Department of Family and Geriatric Medicine, School of Public Health and Information Science, University of Louisville, Louisville, Kentucky, USA
| | - Betty Tsai Do
- Department of Otorhinolaryngology, Health Sciences Center, University of Oklahoma, Oklahoma City, Oklahoma, USA
| | - Courtney C. J. Voelker
- Department of Otolaryngology–Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Richard W. Waguespack
- Department of Otolaryngology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Maureen D. Corrigan
- American Academy of Otolaryngology–Head and Neck Surgery Foundation, Alexandria, Virginia, USA
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Audio-Vestibular Signs and Symptoms in Chiari Malformation Type I. Case Series and Literature Review. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2015. [DOI: 10.1016/j.otoeng.2014.05.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Beh SC, Frohman TC, Frohman EM. Neuro-ophthalmic Manifestations of Cerebellar Disease. Neurol Clin 2014; 32:1009-80. [DOI: 10.1016/j.ncl.2014.07.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shin C Beh
- Department of Neurology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Teresa C Frohman
- Department of Neurology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Elliot M Frohman
- Department of Neurology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA; Department of Ophthalmology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.
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19
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Guerra Jiménez G, Mazón Gutiérrez Á, Marco de Lucas E, Valle San Román N, Martín Laez R, Morales Angulo C. Audio-vestibular signs and symptoms in Chiari malformation type i. Case series and literature review. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2014; 66:28-35. [PMID: 25195076 DOI: 10.1016/j.otorri.2014.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 05/14/2014] [Accepted: 05/19/2014] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Chiari malformation is an alteration of the base of the skull with herniation through the foramen magnum of the brain stem and cerebellum. Although the most common presentation is occipital headache, the association of audio-vestibular symptoms is not rare. The aim of our study was to describe audio-vestibular signs and symptoms in Chiari malformation type i (CM-I). MATERIALS AND METHODS We performed a retrospective observational study of patients referred to our unit during the last 5 years. We also carried out a literature review of audio-vestibular signs and symptoms in this disease. RESULTS There were 9 patients (2 males and 7 females), with an average age of 42.8 years. Five patients presented a Ménière-like syndrome; 2 cases, a recurrent vertigo with peripheral features; one patient showed a sudden hearing loss; and one case suffered a sensorineural hearing loss with early childhood onset. The most common audio-vestibular symptom indicated in the literature in patients with CM-I is unsteadiness (49%), followed by dizziness (18%), nystagmus (15%) and hearing loss (15%). Nystagmus is frequently horizontal (74%) or down-beating (18%). Other audio-vestibular signs and symptoms are tinnitus (11%), aural fullness (10%) and hyperacusis (1%). Occipital headache that increases with Valsalva manoeuvres and hand paresthesias are very suggestive symptoms. CONCLUSIONS The appearance of audio-vestibular manifestations in CM-I makes it common to refer these patients to neurotologists. Unsteadiness, vertiginous syndromes and sensorineural hearing loss are frequent. Nystagmus, especially horizontal and down-beating, is not rare. It is important for neurotologists to familiarise themselves with CM-I symptoms to be able to consider it in differential diagnosis.
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Affiliation(s)
- Gloria Guerra Jiménez
- Servicio de ORL, Complejo Hospitalario Insular Materno Infantil, Las Palmas, Gran Canaria, España.
| | | | | | | | - Rubén Martín Laez
- Servicio de Neurocirugía, Hospital Universitario Marqués de Valdecilla, Santander, España
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Sivakanthan S, Goldhagen C, Danner C, Agazzi S. Hearing loss and Chiari malformation: A clinical pearl. Clin Neurol Neurosurg 2014; 122:20-2. [DOI: 10.1016/j.clineuro.2014.04.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 03/15/2014] [Accepted: 04/09/2014] [Indexed: 11/17/2022]
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21
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Association of Chiari I malformation and cerebellar ectopia with sensorineural hearing loss. J Craniofac Surg 2013; 24:1153-5. [PMID: 23851760 DOI: 10.1097/scs.0b013e318293f840] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
We aimed to examine the prevalence of cerebellar tonsil ectopia and Chiari 1 malformation in sensorineural hearing loss (SHL) that has, to the best of our knowledge, not been studied previously. Magnetic resonance imaging records of 166 subjects with SHL and 50 controls without known otologic disturbances were included in the study. A tonsils descent more than 2 mm was assumed as cerebellar ectopia, and a descent equal to or more than 5 mm was assumed as Chiari 1 malformation. A tonsil descent group was also formed by summation of both groups. Transverse diameters of bilateral intracranial vertebral arteries and transverse sinuses were also measured, and all parameters were analyzed using appropriate statistics. A significant difference of frequencies of Chiari 1, ectopia, and tonsil descent was detected between patients and controls. In comparison of cerebellar ectopia and Chiari 1 groups, SHL did not show any significant difference. The left lateral sinus diameter showed positive correlation with tonsil descent. There was no significant correlation for the diameters of other vessels. A powerful correlation was detected between SHL and age. In addition, right and vertebral artery diameters showed positive correlations with age. Chiari 1 malformation and cerebellar ectopia showed an association with SHL. These patients should also be evaluated for otologic disturbances. Further high-resolution magnetic resonance imaging studies to explain the exact cause of this currently unknown association seems required.
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22
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Rowe FJ. Diplopia and visual impairment as presenting symptoms of shunt failure in association with tonsillar herniation in idiopathic intracranial hypertension. Strabismus 2012; 20:181-4. [PMID: 23211144 DOI: 10.3109/09273972.2012.735334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Two cases of cerebellar tonsilar herniation due to shunt complications in idiopathic intracranial hypertension are reported in which both patients presented with visual symptoms. One patient had horizontal diplopia due to an acute sixth nerve palsy along with severe constriction of visual fields while the second patient had symptoms of blurred vision. Both patients required neurosurgery, one patient requiring surgery for tonsillar descent and revision of an over-draining lumbar peritoneal shunt and the second patient only requiring revision of his over-draining lumbar peritoneal shunt. Following surgery the visual signs of reduced vision, cranial nerve palsy, and visual field loss gradually resolved. Both patients had normal ocular movements and visual fields at final follow-up.
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Affiliation(s)
- Fiona J Rowe
- Directorate of Orthoptics and Vision Science, University of Liverpool, Liverpool, England, UK.
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Klekamp J. Surgical Treatment of Chiari I Malformation—Analysis of Intraoperative Findings, Complications, and Outcome for 371 Foramen Magnum Decompressions. Neurosurgery 2012; 71:365-80; discussion 380. [DOI: 10.1227/neu.0b013e31825c3426] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Abstract
BACKGROUND:
Foramen magnum decompression is widely accepted as the treatment of choice for Chiari I malformation. However, important surgical details of the procedure are controversial.
OBJECTIVE:
This study analyzes 371 decompressions focusing on intraoperative findings, analysis of complications, and long-term outcomes.
METHODS:
Among 644 patients between 1985 and 2010, 359 patients underwent 371 decompressions. Surgery for symptomatic patients consisted of suboccipital craniectomy, C1 laminectomy, arachnoid dissection, and duraplasty. Short-term results were determined after 3 months; long-term outcomes were evaluated with Kaplan-Meier statistics.
RESULTS:
The mean age was 40 ± 16 years; mean follow-up was 49 ± 56 months; 75.8% demonstrated syringomyelia. The complication rate was 21.8% with permanent surgical morbidity of 3.2% and surgical mortality of 1.3%. Of the patients, 73.6% reported improvement after 3 months; 21% were unchanged. Overall, 14.3% demonstrated a neurological deterioration within 5 years and 15.4% within 10 years. The severity of neurological symptoms correlated with the grade of arachnoid pathology. Outcome data correlated with the number of previous decompressions, severity of arachnoid pathology, handling of the arachnoid, type of duraplasty, and surgical experience. First-time decompressions with arachnoid dissection and an alloplastic duraplasty resulted in surgical morbidity for 2.0%, a 0.9% mortality rate, postoperative improvement after 3 months for 82%, and neurological recurrence rates of 7% after 5 years and 8.7% after 10 years.
CONCLUSION:
Arachnoid pathology in Chiari I malformation has an impact on clinical symptoms and postoperative results. Decompressions with arachnoid dissection and an alloplastic duraplasty performed by surgeons experienced with this pathology offer a favorable long-term prognosis.
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Affiliation(s)
- Jörg Klekamp
- Department of Neurosurgery, Christliches Krankenhaus, Quakenbrück, Germany
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Kobayashi M, Sugiyama A. Decreased ratio of downward to horizontal smooth pursuit eye movement velocity in a patient with Chiari I malformation: application in early detection of vestibulocerebellar malfunction. Intern Med 2012; 51:2025-9. [PMID: 22864131 DOI: 10.2169/internalmedicine.51.7268] [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] [Indexed: 11/06/2022] Open
Abstract
A 72-year-old man presented with dizziness and left hand muscle atrophy. Magnetic resonance imaging revealed a spinal cord cavity and descent of the cerebellar tonsils. His diagnosis was Chiari I malformation with syringomyelia. No cerebellar signs were observed on physical examination. The cause of dizziness was investigated using a video-based eye movement tracker, which revealed a downward smooth pursuit velocity gain significantly below normal when expressed relative to the horizontal pursuit velocity gain. Vestibulocerebellar damage can cause mild downward pursuit deficit. The downward to horizontal smooth pursuit velocity gain ratio may be a more sensitive means of detecting vestibulocerebellar damage early.
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Craighero F, Casselman JW, Safronova MM, De Foer B, Delanote J, Officiers EF. [Sudden onset vertigo: imaging work-up]. ACTA ACUST UNITED AC 2011; 92:972-86. [PMID: 22098646 DOI: 10.1016/j.jradio.2011.09.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Accepted: 09/02/2011] [Indexed: 11/27/2022]
Abstract
Vertigo and dysequilibrium are a frequent cause of medical consultation. Clinical evaluation is essential. Some cases of vertigo are diagnosed clinically while others require imaging, sometimes emergently (suspected stroke). MRI is the imaging modality of choice to assess the labyrinth (labyrinthitis? labyrinthine hemorrhage?), internal auditory canal (vestibular schwannoma? other tumor?…) and brain parenchyma including all structures of the auditory pathways: vestibular nuclei, vestibulocerebellar tract, tracts involved with ocular motricity, vestibular cortex… Multiple central etiologies exist: stroke, multiple sclerosis, tumor… However, some etiologies are best depicted with CT, especially lesions of the labyrinth: cholesteatoma, trauma, suspected dehiscence of the superior semicircular canal, suspected labyrinthine fistula… Finally, imaging may be negative (Benign Paroxysmal Positional Vertigo, Meniere's disease, vestibular neuritis, migraine…), merely reducing the differential diagnosis.
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Affiliation(s)
- F Craighero
- Service de radiologie, hôpital Nord des hôpitaux de Marseille, université de la méditerranée Aix-Marseille-II, chemin des Bourrely, 13915 Marseille cedex 20, France.
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Lee GS, Zhou G, Poe D, Kenna M, Amin M, Ohlms L, Gopen Q. Clinical experience in diagnosis and management of superior semicircular canal dehiscence in children. Laryngoscope 2011; 121:2256-61. [DOI: 10.1002/lary.22134] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 04/26/2011] [Accepted: 05/03/2011] [Indexed: 11/07/2022]
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Abstract
Chiari malformation type I (CMI) is a morphological diagnosis defined as the inferior displacement of the cerebellum through the foramen magnum. In parallel to this basic definition of CMI, there are diagnoses that co-exist with CMI in selected patients. In addition, there are specific constellations of clinical symptoms and signs reported in the literature that occur non-randomly in patients affected by CMI. There is no established system that categorizes these CMI-related conditions or even defines them as causes or consequences of CMI. Identifying the relationship between CMI and these associated disorders may allow greater understanding of CMI etiology and potentially inform CMI management.
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Affiliation(s)
- Ruth-Mary deSouza
- Department of Surgery, University Hospital, Coventry and Warwickshire, UK
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O’Reilly RC, Greywoode J, Morlet T, Miller F, Henley J, Church C, Campbell J, Beaman J, Cox AM, Zwicky E, Bean C, Falcheck S. Comprehensive Vestibular and Balance Testing in the Dizzy Pediatric Population. Otolaryngol Head Neck Surg 2011; 144:142-8. [DOI: 10.1177/0194599810393679] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective. To describe the spectrum of balance disease in a large population of children presenting to a tertiary care vestibular and balance laboratory. Study Design. Case series with chart review. Setting. Tertiary care pediatric hospital. Main Outcome Measures. Results of audiometric, vestibular, and balance tests and final diagnosis. Subjects and Methods. Retrospective review of audiometric, vestibular, balance testing, and final diagnosis from a patient database. Results. Between September 2003 and September 2007, 132 children were evaluated at the Alfred I. duPont Hospital for Children Vestibular Disorders Program. Sixty-nine of the patients were boys and 63 were girls. The average age was 9.7 ± 5.0 years (range, 1-17 years). Although not all were able to complete the entire test battery (99 children completed at least 50% of the tests in the protocol), a diagnosis was achieved in most cases. The most common diagnoses were peripheral vestibulopathy (29.5%), migraine/benign recurrent vertigo of childhood (24.2%), motor/developmental delay (10.6%), traumatic brain injury (9.8%), and central nervous system structural lesion (9.1%). Conclusions. Peripheral vestibular deficits and migraine disease account for most of the pathology in the pediatric population. With a multidisciplinary approach, diagnosis of the source of vertigo and imbalance is possible in most children.
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Affiliation(s)
- Robert C. O’Reilly
- Division of Pediatric Otolaryngology, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Jewell Greywoode
- Department of Otolaryngology–Head and Neck Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - Thierry Morlet
- Center for Pediatric Auditory and Speech Sciences, Nemours Biomedical Research, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Freeman Miller
- Gait Laboratory, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - John Henley
- Gait Laboratory, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Chris Church
- Gait Laboratory, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Jeffrey Campbell
- Division of Pediatric Neurosurgery, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Jason Beaman
- Department of Physical Therapy, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Anne Marie Cox
- Department of Audiology, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Emily Zwicky
- Department of Audiology, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
| | - Charles Bean
- Neurology Associates, P.A., Newark, Delaware, USA
| | - Stephen Falcheck
- Department of Neurology, Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
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Fushiki H, Ishida M, Sumi S, Naruse A, Watanabe Y. Correlation between canal paresis and spontaneous nystagmus during early stage of acute peripheral vestibular disorders. Acta Otolaryngol 2010; 130:1352-7. [PMID: 20632905 DOI: 10.3109/00016489.2010.497497] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSIONS This study demonstrates that the resolution period of spontaneous nystagmus (SN) may provide an indication of vestibular dysfunction on a particular day in the primary care setting. OBJECTIVE We aimed to predict canal paresis using fundamental observations of SN during the early stage of acute peripheral vestibular disorders. METHODS The study involved 87 patients who had recently experienced their first episode of acute spontaneous vertigo and direction-fixed horizontal nystagmus. Although they did not exhibit any other neurological deficits, they had been hospitalized with severe acute symptoms between 2004 and 2007. A correlation between the resolution period of SN and the results of laboratory caloric testing was reviewed. RESULTS The receiver operating characteristic analysis showed that the resolution period of SN may be a predictive indicator of unilateral vestibular hypofunction in the acute stage. In about half of the patients, SN disappeared on the third day after their initial visit. However, in 20% of the patients SN still persisted on the eighth day. Among the patients with SN, the prevalence of canal paresis increased with the increase in the resolution period of SN. When SN was observed on the fifth day, the prevalence was approximately 70%.
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Affiliation(s)
- Hiroaki Fushiki
- Department of Otolaryngology, Head & Neck Surgery, University of Toyama, Toyama, Japan.
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Dolgun H, Turkoglu E, Kertmen H, Yilmaz ER, Sekerci Z. Chiari Type I malformation presenting with bilateral hearing loss. J Clin Neurosci 2009; 16:1228-30. [DOI: 10.1016/j.jocn.2008.10.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Revised: 09/22/2008] [Accepted: 10/22/2008] [Indexed: 10/20/2022]
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Levo H, Tapani E, Karppinen A, Kentala E. Chiari Malformation in otology practice. Auris Nasus Larynx 2009; 37:95-9. [PMID: 19409739 DOI: 10.1016/j.anl.2009.02.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Revised: 12/05/2008] [Accepted: 02/07/2009] [Indexed: 10/20/2022]
Abstract
The purpose of the study was to evaluate prevalence, characteristic symptoms, and management of Chiari Malformation 1 (CM1). A retrospective chat review was made in Otology Tertiary Department including 439 otologic patients referred to the Helsinki University Hospital Radiology Department for head magnetic resonance imaging (MRI) during 2005 and also among 42 patients seen at the Department of Neurosurgery in years 2001-2005 with a diagnosis of CM1. We made a structured analysis of medical records focusing on patient history, neurologic symptoms, and radiologic findings. For surgical patients, information was collected on symptoms, treatment, and operative outcome. The prevalence of CM1 in the 439 otologic patients was 0.9%. Most CM1 patients sent to the Neurosurgery Department were operated on. Two months postoperatively, 26 patients (68%) had benefited from the surgery, but 12 patients (32%) experienced no change to symptoms. The possibility of CM1 should be borne in mind in patients presenting with atypical benign positional vertigo or recurrent facial paresis.
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Affiliation(s)
- Hilla Levo
- Department of Otorhinolaryngology, Helsinki University Central Hospital, Helsinki, Finland.
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Bhattacharyya N, Baugh RF, Orvidas L, Barrs D, Bronston LJ, Cass S, Chalian AA, Desmond AL, Earll JM, Fife TD, Fuller DC, Judge JO, Mann NR, Rosenfeld RM, Schuring LT, Steiner RWP, Whitney SL, Haidari J. Clinical Practice Guideline: Benign Paroxysmal Positional Vertigo. Otolaryngol Head Neck Surg 2008; 139:S47-81. [PMID: 18973840 DOI: 10.1016/j.otohns.2008.08.022] [Citation(s) in RCA: 384] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Accepted: 08/21/2008] [Indexed: 11/24/2022]
Abstract
Objectives: This guideline provides evidence-based recommendations on managing benign paroxysmal positional vertigo (BPPV), which is the most common vestibular disorder in adults, with a lifetime prevalence of 2.4 percent. The guideline targets patients aged 18 years or older with a potential diagnosis of BPPV, evaluated in any setting in which an adult with BPPV would be identified, monitored, or managed. This guideline is intended for all clinicians who are likely to diagnose and manage adults with BPPV. Purpose: The primary purposes of this guideline are to improve quality of care and outcomes for BPPV by improving the accurate and efficient diagnosis of BPPV, reducing the inappropriate use of vestibular suppressant medications, decreasing the inappropriate use of ancillary tests such as radiographic imaging and vestibular testing, and to promote the use of effective repositioning maneuvers for treatment. In creating this guideline, the American Academy of Otolaryngology—Head and Neck Surgery Foundation selected a panel representing the fields of audiology, chiropractic medicine, emergency medicine, family medicine, geriatric medicine, internal medicine, neurology, nursing, otolaryngology–head and neck surgery, physical therapy, and physical medicine and rehabilitation. Results The panel made strong recommendations that 1) clinicians should diagnose posterior semicircular canal BPPV when vertigo associated with nystagmus is provoked by the Dix-Hallpike maneuver. The panel made recommendations against 1) radiographic imaging, vestibular testing, or both in patients diagnosed with BPPV, unless the diagnosis is uncertain or there are additional symptoms or signs unrelated to BPPV that warrant testing; and 2) routinely treating BPPV with vestibular suppressant medications such as antihistamines or benzodiazepines. The panel made recommendations that 1) if the patient has a history compatible with BPPV and the Dix-Hallpike test is negative, clinicians should perform a supine roll test to assess for lateral semicircular canal BPPV; 2) clinicians should differentiate BPPV from other causes of imbalance, dizziness, and vertigo; 3) clinicians should question patients with BPPV for factors that modify management including impaired mobility or balance, CNS disorders, lack of home support, and increased risk for falling; 4) clinicians should treat patients with posterior canal BPPV with a particle repositioning maneuver (PRM); 5) clinicians should reassess patients within 1 month after an initial period of observation or treatment to confirm symptom resolution; 6) clinicians should evaluate patients with BPPV who are initial treatment failures for persistent BPPV or underlying peripheral vestibular or CNS disorders; and 7) clinicians should counsel patients regarding the impact of BPPV on their safety, the potential for disease recurrence, and the importance of follow-up. The panel offered as options that 1) clinicians may offer vestibular rehabilitation, either self-administered or with a clinician, for the initial treatment of BPPV and 2) clinicians may offer observation as initial management for patients with BPPV and with assurance of follow-up. The panel made no recommendation concerning audiometric testing in patients diagnosed with BPPV. Disclaimer: This clinical practice guideline is not intended as a sole source of guidance in managing benign paroxysmal positional vertigo. Rather, it is designed to assist clinicians by providing an evidence-based framework for decision-making strategies. The guideline is not intended to replace clinical judgement or establish a protocol for all individuals with this condition, and may not provide the only appropriate approach to diagnosing and managing this problem. ® 2008 American Academy of Otolaryngology–Head and Neck Surgery Foundation. All rights reserved.
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Heuer GG, Gabel B, Lemberg PS, Sutton LN. Chiari I malformation presenting with hearing loss: surgical treatment and literature review. Childs Nerv Syst 2008; 24:1063-6. [PMID: 18542971 DOI: 10.1007/s00381-008-0652-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 04/22/2008] [Indexed: 11/25/2022]
Abstract
OBJECTS Chiari I malformations can present with a number of clinical signs and symptoms. METHODS We present a case of an 11-year-old girl that presented with significant sensorineural hearing loss as her only Chiari-related symptom. The patient had four audiograms that all demonstrated progressive bilateral hearing loss between 10 and 30 dB. On magnetic resonance scan, the patient was found to have a Chiari I malformation. The patient had 9 mm of tonsillar herniation but no syrinx or hydrocephalus was present. On exam, the patient did not exhibit any other symptoms of her Chiari malformation or cranial nerve abnormalities other than sensorineural hearing loss. The patient underwent a suboccipital craniotomy, C1 laminectomy, and duraplasty. The patient noted a subjective improvement in hearing and an audiogram performed at 3 months postoperatively demonstrated normal hearing bilaterally. CONCLUSIONS Sensorineural hearing loss may be caused by Chiari I malformations. This symptom may improve following decompression.
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Affiliation(s)
- Gregory G Heuer
- Division of Neurosurgery, Children's Hospital of Philadelphia, Wood Center, 6th Floor, 34th and Civic Center Blvd, Philadelphia, PA 19104, USA
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Simons JP, Ruscetta MN, Chi DH. Sensorineural hearing impairment in children with Chiari I malformation. Ann Otol Rhinol Laryngol 2008; 117:443-7. [PMID: 18646441 DOI: 10.1177/000348940811700607] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES We describe the prevalance of Chiari I malformation in children presenting to a pediatric tertiary care hearing loss clinic, characterize the phenotype of hearing loss in children with Chiari I malformation, and discuss the potential pathophysiology of sensorineural hearing impairment (SNHI) related to Chiari I malformation. METHODS This study was a retrospective case series of patients seen in a pediatric tertiary care hearing loss clinic affiliated with an academic medical center. We considered 481 patients with SNHI who had radiographic imaging as part of the evaluation for the cause of their hearing impairment. Hearing impairment was determined by behavioral audiogram and/or auditory brain stem response testing. Radiographic imaging was performed with computed tomography and/or magnetic resonance imaging. RESULTS Six children with SNHI also had a diagnosis of Chiari I malformation. Four of these 6 children had unilateral hearing impairment. One child had asymmetric bilateral impairment; 1 child had symmetric bilateral impairment. The severity of hearing impairment varied from mild to profound. All children were referred to the neurosurgery department. None underwent surgical decompression. CONCLUSIONS Chiari I malformation may be associated with SNHI. Central nervous system imaging for the evaluation of children with SNHI may be indicated, particularly in individuals with negative results on temporal bone computed tomography and genetic testing.
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Affiliation(s)
- Jeffrey P Simons
- Department of Pediatric Otolaryngology, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA
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Abstract
We report five children with previously unrecognized vestibular dysfunction detected by clinical examination and confirmed by quantitative vestibular testing. Patient 1 presented with fluctuating visual acuity and intermittent nystagmus. Patient 2 had congenital hearing loss associated with imbalance, delayed motor development, and cyclic vomiting. Patient 3 had neurotrophic keratitis with an intermittent head tilt, imbalance, and motor delays. Patient 4 showed ataxia and eye movement abnormalities following traumatic brain injury and had reading difficulties. Patient 5 had episodic vertigo and eye movement abnormalities from infancy. Clinical vestibular testing emphasized spontaneous nystagmus, rapid head thrust, and assessment of post-rotatory nystagmus. Quantitative vestibular testing included the sinusoidal chair rotation and velocity step tests, measurement of dynamic visual acuity, post-head-shake nystagmus, and computerized platform posturography. Pediatric neurologists encounter children with congenital and compensated vestibular dysfunction, which can be recognized on the basis of relevant history and clinical abnormalities of the ocular-ocular reflex.
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Affiliation(s)
- Avery H Weiss
- Division of Ophthalmology, Children's Hospital and Regional Medical Center, and Department of Ophthalmology, University of Washington, Seattle 98115, USA.
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Rusbridge C, Greitz D, Iskandar BJ. Syringomyelia: Current Concepts in Pathogenesis, Diagnosis, and Treatment. J Vet Intern Med 2006. [DOI: 10.1111/j.1939-1676.2006.tb02884.x] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kim JS, Yoon B, Choi KD, Oh SY, Park SH, Kim BK. Upbeat nystagmus: clinicoanatomical correlations in 15 patients. J Clin Neurol 2006; 2:58-65. [PMID: 20396486 PMCID: PMC2854944 DOI: 10.3988/jcn.2006.2.1.58] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2005] [Accepted: 02/14/2006] [Indexed: 11/23/2022] Open
Abstract
Background and Purpose The mechanism of upbeat nystagmus is unknown and clinicoanatomical correlative studies in series of patients with upbeat nystagmus are limited. Methods Fifteen patients with upbeat nystagmus received full neuro-ophthalmological evaluation by the senior author. Nystagmus was observed using video Frenzel goggles and recorded with video-oculography. Brain lesions were documented with MRI. Results Lesions responsible for nystagmus were found throughout the brainstem, mainly in the paramedian area: in the medulla (n=8), pons (n=3), pons and midbrain with or without cerebellar lesions (n=3), and midbrain and thalamus (n=1). Underlying diseases comprised cerebral infarction (n=10), multiple sclerosis (n=2), cerebral hemorrhage (n=1), Wernicke encephalopathy (n=1), and hydrocephalus (n=1). Upbeat nystagmus was mostly transient and showed occasional evolution during the acute phase. In one patient with a bilateral medial medullary infarction, the upbeat nystagmus changed into a hemiseesaw pattern with near complete resolution of the unilateral lesion. Gaze and positional changes usually affected both the intensity and direction of the nystagmus. A patient with a cervicomedullary lesion showed a reversal of upbeat into downbeat nystagmus by straight-head hanging and leftward head turning while in the supine position. Gaze-evoked nystagmus (n=7), ocular tilt reaction (n=7), and internuclear ophthalmoplegia (n=4) were also commonly associated with upbeat nystagmus. Conclusions In view of the responsible lesions and associated neuro-ophthalmological findings, upbeat nystagmus may be ascribed to damage to the pathways mediating the upward vestibulo-ocular reflex or the neural integrators involved in vertical gaze holding.
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Affiliation(s)
- Ji Soo Kim
- Department of Neurology, College of Medicine, Seoul National University, Seongnam, Korea
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Yassari R, Frim D. Evaluation and management of the Chiari malformation type 1 for the primary care pediatrician. Pediatr Clin North Am 2004; 51:477-90. [PMID: 15062680 DOI: 10.1016/s0031-3955(03)00208-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Diagnosis and treatment of CMI is undergoing reexamination that includes redefinition of the anatomic Chiari malformation and refinement and redefinition of the clinical syndrome. Children with SMI present with head pain of some kind, a neurologic deficit, or with signs of spinal cord dysfunction from syrinx. Some will present with no clinical syndrome at all. Presence of anatomic Chiari malformation or compelling clinical Chiari syndrome should lead to evaluation by a neurologist or neurosurgeon experienced with the syndromes and their treatment. Treatment options are varied but usually result in resolution of symptoms. When symptoms persist after surgery, management is complex and not uniformly successful, even in the most experienced hands.
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Affiliation(s)
- Reza Yassari
- Section of Neurosurgery, Department of Surgery, University of Chicago Hospitals, IL 60637, USA
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