Prevalence of Otic Capsule Dehiscence in Temporal Bone Computed Tomography Scan Publisher Pubmed



Motasaddi Zarandy M^{1, 2} ; Kouhi A^{1, 2} ; Emami H^{1, 2} ; Amirzargar B^{1, 2} ; Kazemi MA³ Show Affiliations
Source: European Archives of Oto-Rhino-Laryngology Published:2023

Abstract

Purpose: To investigate the radiologic prevalence of otic capsule dehiscence in temporal bone computed tomography (CT) scan. Methods: This was a cross-sectional study. The temporal bone CT scans of the patients presenting to a tertiary center were evaluated for possible dehiscence in any part of the otic capsule; then, all of the dehiscence were confirmed by a trained academic radiologist. For each type of otic capsule dehiscence, at least three planes were used with a specific type of reconstruction. When a dehiscence was present in at least two consecutive images in all planes, it was considered as a true dehiscence. Results: Six hundred patients (mean age: 40 ± 18.1 years) were enrolled. The prevalence of superior and posterior semicircular canal dehiscence was 6.0% and 2.7%, respectively. The prevalence of cochlear-facial dehiscence, cochlear-internal auditory canal dehiscence, and cochlear-carotid dehiscence was 6.3%, 0.7%, and 0.7%, respectively. The prevalence of vestibular aqueduct-jugular bulb dehiscence was 6.3% and the prevalence of posterior semicircular canal-jugular bulb dehiscence was 0.2%. Conclusions: Considering different types of otic capsule dehiscence described, care should be taken in patients with vestibular and auditory signs and symptoms to diagnose these dehiscences. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.