Format

Send to

Choose Destination
J Laryngol Otol. 2010 Mar;124(3):333-5. doi: 10.1017/S0022215109991241. Epub 2009 Sep 29.

Head rotation evoked tinnitus due to superior semicircular canal dehiscence.

Author information

1
Department of Otolaryngology, School of Medicine, Kangwon National University, Chunchon, South Korea.

Abstract

INTRODUCTION:

Superior semicircular canal dehiscence affects the auditory and vestibular systems due to a partial defect in the canal's bony wall. In most cases, sound- and pressure-induced vertigo are present, and are sometimes accompanied by pulse-synchronous tinnitus.

CASE PRESENTATION:

We describe a 50-year-old man with superior semicircular canal dehiscence whose only complaints were head rotation induced tinnitus and autophony. Head rotation in the plane of the right semicircular canal with an angular velocity exceeding 600 degrees/second repeatedly induced a 'cricket' sound in the patient's right ear. High resolution temporal bone computed tomography changes, and an elevated umbo velocity, supported the diagnosis of superior semicircular canal dehiscence.

CONCLUSION:

In addition to pulse-synchronous or continuous tinnitus, head rotation induced tinnitus can be the only presenting symptom of superior semicircular canal dehiscence without vestibular complaints. We suggest that, in our patient, the bony defect of the superior semicircular canal ('third window') might have enhanced the flow of inner ear fluid, possibly producing tinnitus.

PMID:
19785926
PMCID:
PMC2822878
DOI:
10.1017/S0022215109991241
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Cambridge University Press Icon for PubMed Central
Loading ...
Support Center