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June 1970

Herniation of the Facial Nerve in the Middle Ear

Author Affiliations

Ann Arbor, Mich
From the Kresge Hearing Research Institute and the Department of Otorhinolaryngology, University of Michigan Medical School, Ann Arbor. Dr. Kingsley is currently at the Department of Pathology, St. Joseph Mercy Hospital, Ann Arbor.

Arch Otolaryngol. 1970;91(6):598-602. doi:10.1001/archotol.1970.00770040828019

A tumor-like herniation of the tympanic portion of the facial nerve discovered during an anatomical dissection is presented to demonstrate its possible surgical hazard through confusion with a peripheral nerve neoplasm. Microscopic examination of serial sections showed all the nerve fibers taking an omega-shaped aberrant course through the herniation. An avascular strand arising from the promontory and crossing the intercrural space of the stapes was observed. It is assumed to be a remnant of the stapedial artery, and its persistence is thought to be responsible for the dehiscence of the facial canal and herniation of the nerve.

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