Congenital Aplasia of the External Ear Canal and Total Dehiscence of Mastoid-Tympanic Segment of the Facial Nerve as a Cause of Recurrent Facial Paralysis

TOPLU Y. , Kalcioglu M. T. , KARATAŞ E. , BAYINDIR T.

JOURNAL OF CRANIOFACIAL SURGERY, cilt.24, 2013 (SCI İndekslerine Giren Dergi) identifier identifier identifier


Facial nerve (FN) macrodehiscence, in contrast to microdehiscence, generally occurs as a result of chronic otitis media and is rarely seen congenitally. A patient with normal hearing who had no history of ear disease or ear operation came to the clinic with recurrent facial paralysis (FP) and frequent blockage of the external ear canal with epithelial debris complaints. In the explorative ear surgery, we observed that the posterior wall of the external ear canal or tympanic ring was absent, a large external ear cavity was covered with a thin skin, the FN was under the skin, and the tympanic-mastoid segment of the FN and chorda tympani extending to the stylomastoid foramen was completely open. FP episodes were associated with the unprotected FN.