Document Detail

Anterior Inferior Cerebellar Artery Aneurysms Mimicking Vestibular Schwannomas.
MedLine Citation:
PMID:  23316934     Owner:  NLM     Status:  Publisher    
BACKGROUND AND PURPOSE: Unruptured anterior inferior cerebellar artery (AICA) aneurysms are rare but potentially lethal cerebellopontine angle (CPA) lesions that may be misdiagnosed as vestibular schwannomas when they present with vestibulo-cochlear symptoms. METHODS: We report two cases of unruptured but symptomatic AICA aneurysms initially referred to us as atypical vestibular schwannomas requiring surgery. Two discriminant MR features are described. RESULTS: One patient refused treatment. The other was successfully treated by coil occlusion. CONCLUSIONS: Caution is advised before suspecting a CPA mass to be a purely extra-canalicular schwannoma, given its extreme rarity. Deafness and cerebellar ischemia may be prevented if AICA aneurysms are correctly identified preoperatively. In the absence of specific arterial imaging, two MR features may distinguish them from vestibular schwannomas: (1) the absence of internal auditory canal enlargement and (2) the "blurry dot sign," representing blood flow artefacts on pre- and postcontrast studies.
Aïda Kawkabani Marchini; Pascal J Mosimann; Jean-Pierre Guichard; Monique Boukobza; Emmanuel Houdart
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-14
Journal Detail:
Title:  Journal of neuroimaging : official journal of the American Society of Neuroimaging     Volume:  -     ISSN:  1552-6569     ISO Abbreviation:  J Neuroimaging     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9102705     Medline TA:  J Neuroimaging     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 by the American Society of Neuroimaging.
From the Department of Neuroradiology, Hôpital Lariboisière, Paris, France.
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