Document Detail

Bilateral narrow duplication of the internal auditory canal.
MedLine Citation:
PMID:  20426887     Owner:  NLM     Status:  In-Process    
AIM: To demonstrate diagnostic imaging of an extremely rare presentation of bilateral narrow duplication of the internal auditory canal.
CASE REPORT: An adolescent boy with profound sensorineural hearing loss presented for hearing rehabilitation. Imaging studies (i.e. multidetector computed tomography and magnetic resonance imaging) clearly demonstrated bilateral duplication of the internal auditory canals, with narrowing of the lower canals, unilateral cochlear and vestibular dysplasia, bilateral superior semicircular canal malformation, and bilateral absence of the posterior semicircular canals.
CONCLUSION: To our knowledge, this is only the third such case described in the literature. Considering that the vestibulocochlear nerve has been unable to be demonstrated in almost all cases of duplicated internal auditory canal (unilateral and bilateral), our case supports the hypothesis that vestibulocochlear nerve aplasia or hypoplasia leads to internal auditory canal stenosis. We consider this rare presentation of bilateral narrow duplication of the internal auditory canal to represent a contraindication for cochlear implantation.
L O M Coelho; S E Ono; A Carvalho Neto; J F Polanski; M Buschle
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Publication Detail:
Type:  Journal Article     Date:  2010-04-29
Journal Detail:
Title:  The Journal of laryngology and otology     Volume:  124     ISSN:  1748-5460     ISO Abbreviation:  J Laryngol Otol     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8706896     Medline TA:  J Laryngol Otol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1003-6     Citation Subset:  AIM; IM    
Department of Radiology, DAPI-Diagnóstico Avançado por Imagem, Curitiba, PR Brazil.
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