Superior canal dehiscence size: Multivariate assessment of clinical impact

Wade W. Chien, Kristen Janky, Lloyd B. Minor, John P. Carey

Research output: Contribution to journalArticle

32 Scopus citations


Objective: To examine the association between dehiscence length in patients with superior semicircular canal dehiscence syndrome and their clinical findings, including objective audiometric and vestibular testing results. Study Design: Retrospective study. Setting: Tertiary referral center. Patients: Patients included in this study were diagnosed with superior semicircular canal dehiscence syndrome and underwent surgical repair of the dehiscence through middle fossa craniotomy. The dehiscence length was measured intraoperatively in all cases. Main Outcome Measures: Correlation between dehiscence length with pure-tone average (PTA), average bone-conduction threshold, maximal air-bone gap, cervical vestibular evoked myogenic potential thresholds, and presenting signs and symptoms. Results: The correlation between dehiscence length and maximal air-bone gap was statistically significant on both univariate and multivariate regression analyses. The correlations between dehiscence length and PTA, average bone-conduction threshold, cervical vestibular evoked myogenic potential threshold, and presenting signs and symptoms were not statistically significant. Conclusion: The dehiscence length correlated positively with the maximal air-bone gap in patients with superior semicircular canal dehiscence. The correlation was statistically significant. The dehiscence length did not correlate with the other variables examined in this study.

Original languageEnglish (US)
Pages (from-to)810-815
Number of pages6
JournalOtology and Neurotology
Issue number5
StatePublished - Jul 1 2012



  • Conductive hearing loss
  • Hyperacusis
  • Oscillopsia
  • Superior semicircular canal dehiscence
  • Third window
  • Tullio phenomenon
  • Vertigo

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Sensory Systems
  • Clinical Neurology

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