Korean J Otolaryngol-Head Neck Surg.
2002 Dec;45(12):1184-1187.
A Case of High Jugular Bulb Associated with Conductive Hearing Loss
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- 1Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Chunbuk National University, Jeonju, Korea. yang2002@dreamwiz.com
Abstract
- A high jugular bulb is often discovered as an incidental finding that is asymptomatic. The incidence of high jugular bulb protruding into the level of oval window is rare. Conductive hearing loss in association with this anomaly may occur, but has been reported infrequently in the literature. We report one case of high jugular bulb and the associated conductive hearing loss. Mechanisms to explain the conductive hearing loss include contact of the jugular bulb with tympanic membrane, interference with the ossicular chain, and obstruction of the round and oval window niche. The operative findings, radiographic and audiometric data that support these mechanisms of couductive hearing loss are presented.
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