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Tomoyuki Hoshino, MD; Michael M. Paparella, MD

Arch Otolaryngol. 1970;92(2):114-117.

Abstract
A herniation of cochlear epithelial cells through the apical basilar membrane was recognized in five squirrel monkeys and in two cats in the presence of endolymphatic hydrops. A transmeatal labyrinthotomy was performed on six of these animals. These six developed marked hyperplastic changes in the vestibule and the lower turn of the cochlea. Except for marked distention of Reissner's membrane, the preservation of cellular elements in the cochlear duct was relatively good in most cases. We postulate that the herniations occurred from a marked pressure increase of the endolymphatic space.

Author Affiliations
Minneapolis

From the Department of Otolaryngology, University of Minnesota Hospitals, Minneapolis.

Footnotes
Accepted for publication Feb 18, 1970.

Reprint requests to A-605 Mayo Memorial Bldg, Minneapolis 55455 (Dr. Paparalla).

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