Superior semicircular canal dehiscence (SSCD) syndromes is a well-known entity in neurotology. Currently the size of the bony dehiscence is measured using two dimensional lengths. The authors present a novel method to measure the volume of the dehiscence and its potential as to predict outcomes following surgery to repair the SSCD. They imported 37 high-resolution computed tomographic temporal bone images of dehiscences into a segmentation software. Dehiscence lengths and volumes were determined by independent authors. The study indicates that dehiscence volume segmentation had excellent internal consistency with independent raters and was less variable as compared to dehiscence length. The authors found that dehiscence length was associated with improved symptoms of dizziness. They could not identify any other significant predictors of symptom outcomes after surgery. The authors conclude that due to low statistical power, the study could not substantiate SSCD volumetry as a potential predictor of symptom outcomes.

Novel Method of measuring canal dehiscence and evaluation of its potential as a predictor of symptoms outcomes after middle fossa craniotomy.
Lagman C, Beckett JS, Chung LK, et al.
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Gauri Mankekar

Department of Otolaryngology-Head Neck Surgery, Louisiana State University Shreveport, Louisiana, USA.

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