Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-24T12:22:18.059Z Has data issue: false hasContentIssue false
  • English
  • Français

Bilateral narrow duplication of the internal auditory canal

Published online by Cambridge University Press:  29 April 2010

L O M Coelho ,
S E Ono ,
A Carvalho Neto ,
J F Polanski  and
M Buschle
L O M Coelho
Affiliation:
Department of Radiology, DAPI-Diagnóstico Avançado por Imagem, Curitiba, PR Brazil
S E Ono*
Affiliation:
Department of Radiology, DAPI-Diagnóstico Avançado por Imagem, Curitiba, PR Brazil
A Carvalho Neto
Affiliation:
Department of Radiology, DAPI-Diagnóstico Avançado por Imagem, Curitiba, PR Brazil
J F Polanski
Affiliation:
Department of Otorhinolaryngology, Hospital Iguaçu, Curitiba, PR Brazil
M Buschle
Affiliation:
Department of Otorhinolaryngology, Hospital Iguaçu, Curitiba, PR Brazil
*
Address for correspondence: Dr Sergio E Ono, Clínica DAPI, Rua Brigadeiro Franco, 122 CEP 80430-210, Curitiba, PR Brazil. E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

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.

Keywords

Internal Auditory CanalSensorineural Hearing LossCongenital
Type
Clinical Records
Information
The Journal of Laryngology & Otology , Volume 124 , Issue 9 , September 2010 , pp. 1003 - 1006
Copyright
Copyright © JLO (1984) Limited 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Demir, ÖI, Cakmakei, H, Erdag, TK, Men, S. Narrow duplicated internal auditory canal: radiological findings and review of the literature. Pediatr Radiol 2005;35:1220–3CrossRefGoogle ScholarPubMed
2Weissman, JL, Arriaga, M, Curtin, HD et al. Duplication anomaly of the internal auditory canal. Am J Neuroradiol 1991;12:867–69Google Scholar
3Lee, SY, Cha, S-H, Jeon, MH, Bae, IH, Han, GS, Kim, SJ et al. Narrow duplicated or triplicated internal auditory canal (3 cases and review of literature): can we regard the separated narrow internal auditory canal as the presence of vestibulocochlear nerve fibers? J Comput Assist Tomogr 2009;33:565–70Google Scholar
4Weon, YC, Kim, JH, Choi, SK, Koo, J-W. Bilateral duplication of the internal auditory canal. Pediatr Radiol 2007;37:1047–9CrossRefGoogle ScholarPubMed
5Bakar, TG, Karadag, D, Calisir, C, Adapinar, B. Bilateral narrow duplicated internal auditory canal. Eur Arch Otorhinolaryngol 2008;265:999–1001Google Scholar
6Ferreira, T, Shayestehfar, B, Lufkin, R. Narrow, duplicated internal auditory canal. Neuroradiology 2003;45:308–10Google Scholar