Sensitivity of High-resolution Computed Tomography of Temporal Bone in the Diagnosis of Otosclerosis.

Background Otosclerosis is a common cause of hearing loss and manifests as stapedial and cochlear variant on computed tomography. Objective To determine the sensitivity of High-Resolution Computed Tomography of temporal bone in patients with surgically confirmed otosclerosis. Method A cross-sectional study was performed between October, 2020 to March, 2024 in a tertiary center. Patients aged 18 to 60 years who underwent stapedotomy were included in the study and pre-operative High Resolution Computed Tomography of the temporal bone were interpreted. Sensitivity of the Computed Tomography to detect otospongiotic focus was calculated. Result Sixty-three patients were enrolled with mean age of 32.2 ± 8.6 years. Fifty had otospongiotic focus on computed tomography. The sensitivity of High-Resolution Computed Tomography of temporal bone to identify otosclerosis was 79%. Fissula ante fenestram and cochlea were most commonly involved sites. Conclusion The sensitivity of scan of the temporal bone in patients with surgically confirmed otosclerosis is good when evaluated by an experienced radiologist.