Document Detail

Screening for vestibular schwannoma by magnetic resonance imaging: analysis of 1821 patients.
MedLine Citation:
PMID:  14967854     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To study the spectrum of diseases that can be detected by magnetic resonance imaging in patients suspected to have vestibular schwannoma (acoustic neuroma) presenting with sensorineural or mixed hearing loss, and to assess the extent of the problem of hearing loss in a screened population. DESIGN: Retrospective study. SETTING: Diagnostic radiology and imaging department of a regional hospital, Hong Kong. PATIENTS: A total of 1821 consecutive patients from September 1999 to February 2001 with sensorineural or mixed hearing loss were referred by otolaryngologists for magnetic resonance imaging of the internal auditory canal. MAIN OUTCOME MEASURES: Vestibular schwannoma; other cerebellopontine angle masses and other diseases that could account for the patients' hearing loss. RESULTS: In all, 132 (7%) patients had positive findings that could explain their hearing loss. Fifty-four (41%) of the 132 patients had vestibular schwannoma; 39 (30%) had inflammation of the middle ear and mastoids; 17 (13%) had ischaemic foci in the brainstem; 10 (8%) had other cerebellopontine angle masses or tumours; four (3%) had inner ear dysplasia; seven (5%) had vascular loop compression; and one (1%) had chronic cryptococcal meningitis. The overall incidence of vestibular schwannoma detected in this screened population was about 3%. CONCLUSIONS: This study indicates that magnetic resonance imaging is an effective tool to screen for vestibular schwannoma in patients with sensorineural or mixed hearing loss. It can also be used to assess a considerable number of different pathological conditions in patients with audiovestibular disorders.
T L Kwan; K W Tang; K K T Pak; J Y L Cheung
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Hong Kong medical journal = Xianggang yi xue za zhi / Hong Kong Academy of Medicine     Volume:  10     ISSN:  1024-2708     ISO Abbreviation:  Hong Kong Med J     Publication Date:  2004 Feb 
Date Detail:
Created Date:  2004-02-17     Completed Date:  2004-06-22     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  9512509     Medline TA:  Hong Kong Med J     Country:  China    
Other Details:
Languages:  eng     Pagination:  38-43     Citation Subset:  IM    
Department of Radiology and Imaging, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, Hong Kong.
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MeSH Terms
Brain Ischemia / diagnosis
Cerebellopontine Angle / pathology
Ear, Inner / abnormalities,  pathology
Hearing Loss / etiology*
Hong Kong
Magnetic Resonance Imaging*
Mass Screening / methods*
Mastoiditis / diagnosis
Meningitis, Cryptococcal / diagnosis
Nerve Compression Syndromes / diagnosis
Neuroma, Acoustic / diagnosis*
Otitis Media / diagnosis
Retrospective Studies
Vertebral Artery / pathology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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