superior canal dehiscence syndrome


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superior canal dehiscence syndrome

A condition affecting the inner ear caused by a thinning or loss of the temporal bone overlying the semicircular canal of the vestibular system, which may be due to trauma, neoplasia or, less commonly, congenital.

Clinical findings
Autophony, dizziness, chronic vertigo, Tullio phenomenon, hyperacusis, conductive hearing loss, pulsatile tinnitus, brain fog, fatigue, headaches.

Diagnosis
High-definition CT, vestibular evoked myogenic potential (VEMP) test, videonystagmography, electrocochleography.

Management
Surgical resurfacing of temporal bone, or plugging of  superior semicircular canal.
References in periodicals archive ?
However, Minor reported in 2000 that it is important to test a patient whose BC level is less than 0 dB in order to uncover possible BC hypersensitivity, which is commonly seen in superior canal dehiscence syndrome. (2)

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