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International Journal of Otolaryngology
Volume 2012, Article ID 679708, 5 pages
http://dx.doi.org/10.1155/2012/679708
Clinical Study

The Dehiscent Facial Nerve Canal

Department of ORL and HNS, Anadolu Medical Center, Gebze, 41400 Kocaeli, Turkey

Received 12 July 2011; Accepted 29 November 2011

Academic Editor: Peter S. Roland

Copyright © 2012 Sertac Yetiser. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Accidental injury to the facial nerve where the bony canal defects are present may result with facial nerve dysfunction during otological surgery. Therefore, it is critical to know the incidence and the type of facial nerve dehiscences in the presence of normal development of the facial canal. The aim of this study is to review the site and the type of such bony defects in 144 patients operated for facial paralysis, myringoplasty, stapedotomy, middle ear exploration for sudden hearing loss, and so forth, other than chronic suppurative otitis media with or without cholesteatoma, middle ear tumors, and anomaly. Correlation of intraoperative findings with preoperative computerized tomography was also analyzed in 35 patients. Conclusively, one out of every 10 surgical cases may have dehiscence of the facial canal which has to be always borne in mind during surgical manipulation of the middle ear. Computerized tomography has some limitations to evaluate the dehiscent facial canal due to high false negative and positive rates.