Superior canal dehiscence size:  multivariate assessment of clinical impact.
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.


METHODS
Retrospective study.


METHODS
Tertiary referral center.


METHODS
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.


METHODS
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.


CONCLUSIONS
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.
Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, USA. wchien1@jhmi.edu
Wade W
WW
Chien
Kristen
K
Janky
Lloyd B
LB
Minor
John P
JP
Carey
D000328:Adult; D000368:Aged; D001309:Auditory Threshold / Q000502:physiology; D001844:Bone Conduction / Q000502:physiology*; D004427:Ear Diseases / Q000473:pathology* / Q000503:physiopathology; D005260:Female; D006314:Hearing Loss, Conductive / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012665:Semicircular Canals / Q000473:pathology* / Q000503:physiopathology; D058585:Vestibular Evoked Myogenic Potentials / Q000502:physiology