Dehiscence of the anterior semicircular canal and otosclerosis: a case report
Nguyen, D.Q.; Morel, N.; Dumas, G.; Boubagra, K.; Schmerber, S.
Revue de Laryngologie - Otologie - Rhinologie 127(3): 151-155
2006
ISSN/ISBN: 0035-1334 PMID: 17007187 Document Number: 604055
The dehiscence of the anterior semicircular canal is a new clinical entity, it is necessary to consider this when a gusher occurs during stapedial surgery. We report a rare case of dehiscence of the anterior canal associated with otosclerosis. This was revealed by a gusher during the initial stapedectomy. At 3 months, an obliteration of the dehiscence was necessary by middle cranial fossa approach (persistant vestibular symptoms), seven months later. Revision stapedial surgery resulted in complete closure of the air-bone-gap. High resolution CT scans of the temporal bone are the key to diagnosis. It is necessary to appreciate this pathology with advances in canal and vestibular surgery.