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Case Reports
. 1999 Nov-Dec;20(10):1973-5.

Sound- and pressure-induced vertigo associated with dehiscence of the roof of the superior semicircular canal

A Mong  1 , L A Loevner, D Solomon, D C Bigelow
Affiliations
Case Reports

Sound- and pressure-induced vertigo associated with dehiscence of the roof of the superior semicircular canal

A Mong et al. AJNR Am J Neuroradiol. 1999 Nov-Dec.

Abstract

In many types of peripheral vertigo, imaging is not part of the initial evaluation. We present a patient with sound- and pressure-induced vertigo associated with bony dehiscence of the roof of the superior semicircular canal. The diagnosis of this new entity can only be made by high-resolution coronal CT imaging of the temporal bones. In patients with this symptom complex, CT should be performed early in the diagnostic workup.

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Figures

<sc>fig</sc> 1.
fig 1.
A 33-year-old woman with sound-induced (Tullio phenomenon) and pressure-induced (Hennebert's sign) vertigo associated with dehiscence of the arcuate eminence (roof) of the superior semicircular canal. A, 1-mm-thick coronal CT scan through the right temporal bone shows a defect (arrow) in the roof of the superior semicircular canal. B, 1-mm-thick coronal CT image posterior to A again shows dehiscence (arrow) of the bony roof of the superior semicircular canal. C and D, Corresponding coronal CT scans of the patient's normal left labyrinth for comparison showing an intact arcuate eminence (arrows).
See this image and copyright information in PMC

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