International Journal of Anatomy Radiology and Surgery (Jan 2020)
An Uncommon Case of Bilateral Posterior and Superior Semicircular Canal Dehiscence Syndrome
Abstract
Semicircular Canal Dehiscences (SCD) are rare and involvement of Posterior Semicircular Canal (PSCC) and/or multiple dehiscences are even rarer. A dehiscence of any of the semicircular canals may produce various auditory or vestibular symptoms by creating an abnormal communication between the inner ear and nearby structures. We report a rare case of multiple dehiscence with intracranially protruding PSCC and Superior Semicircular Canal (SSCC) beyond the margins of temporal bone with bony roof defects in bilateral PSCCs and SSCCs in a patient with chief complaints of positional vertigo.
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