Posterior semicircular canal dehiscence: value of VEMP and multidetector CT.
Copyright policy Posterior semicircular canal dehiscence: value of VEMP and multidetector CT.
To illustrate that posterior semicircular canal dehiscence can present similarly to superior semicircular canal dehiscence.The symptomatology initially presented as probable Menière's disease evolving into a mixed conductive hearing loss with a Carhart notch-type perceptive component suggestive of otosclerosis-type stapes fixation. A small hole stapedotomy resulted in a dead ear and a horizontal semicircular canal hypofunction. Recurrent incapacitating vertigo attacks developed. Vestibular evoked myogenic potential (VEMP) testing demonstrated intact vestibulocollic reflexes. Additional evaluation with high resolution multidetector computed tomography (MDCT) of the temporal bone showed a dehiscence of the left posterior semicircular canal.Besides superior semicircular canal dehiscence, posterior semicircular canal dehiscence has to be included in the differential diagnosis of atypical Menière's disease and/or low tone conductive hearing loss. The value of performing MDCT before otosclerosis-type surgery is stressed. VEMP might contribute to establishing the differential diagnosis.
- University of Antwerp Belgium
- Antwerp University Hospital Belgium
Adult, Severity of Illness Index, Semicircular Canals, Diagnosis, Differential, Electrophysiology, Otosclerosis, Evoked Potentials, Auditory, Humans, Female, Otologic Surgical Procedures, Tomography, X-Ray Computed, Follow-Up Studies
Adult, Severity of Illness Index, Semicircular Canals, Diagnosis, Differential, Electrophysiology, Otosclerosis, Evoked Potentials, Auditory, Humans, Female, Otologic Surgical Procedures, Tomography, X-Ray Computed, Follow-Up Studies
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