Korean J Otolaryngol-Head Neck Surg.  2007 May;50(5):451-455.

A Case of Superior Semicircular Canal Dehiscence Syndrome

Affiliations
  • 1Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seongnam, Korea. jwkoo99@snu.ac.kr
  • 2Department of Neurology, Seoul National University College of Medicine, Seongnam, Korea.
  • 3Department of Radiology, Seoul National University College of Medicine, Seongnam, Korea.

Abstract

Dehiscence of bone overlying the superior semicircular canal (superior semicircular canal dehiscence syndrome) may have both vestibular and auditory manifestations. Lowered vestibular evoked myogenic potential (VEMP) threshold in patients with an apparent conductive hearing loss and normal acoustic reflex also suggests this syndrome. Herein, we present a patient with the Tullio phenomenon, sound induced nystagmus, vibration induced nystagmus, and lowered VEMP threshold without conductive hearing loss due to the superior semicircular canal dehiscence.

Keyword

Superior semicircular canal dehiscence syndrome; Vertigo; Evoked potentials

MeSH Terms

Evoked Potentials
Hearing Loss, Conductive
Humans
Reflex, Acoustic
Semicircular Canals*
Vertigo
Vibration
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