Abstract
Received December 23, 2010 Accepted January 14, 2011 Address for correspondence Ja-Won Koo, MD Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-dong, Bundang-gu, Seongnam 463-707, Korea Tel +82-31-787-7402 Fax +82-31-787-4057 E-mail jwkoo99@snu.ac.kr Superior canal dehiscence (SCD) syndrome is characterized by sound and pressure induced vertigo accompanying vertical-torsional nystagmus. Since the severity of symptoms and signs in SCD may depend on the amount of bony dehiscence of the superior semicircular canal, typical clinical presentations are not always accompanied in every patient. And symptoms of SCD are frequently vague and non-specific, such as aural fullness, disequilibrium or floating sensation of dizziness. Routine vestibular laboratory tests cannot provide disease-specific diagnostic clue, which makes this diagnosis more difficult. This review provides information to understand the pathophysiologic mechanism of symptoms and signs in SCD, and characteristic features of diagnostic tests targeted to SCD. Korean J Otorhinolaryngol-Head Neck Surg 2011;54:117-23
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