Bilateral Cochlear Otosclerosis; Clinic and Radiologic Findings

Abstract

In this report, we presented a 41-year-old female patient with unilateral hearing loss in the right ear. Previously she had a traffic accident, but had no history of ear infection. High resolution computed tomography revealed bilateral cochlear otosclerosis, with no evidence of ossicle dislocation. It was thought that cochlear otosclerosis caused mixed type hearing loss in the right ear by involving the lateral wall of the otic capsule and sensorineural hearing loss in the left ear. We think that fenestral and cochlear type otosclerosis incidentally occurred along a continuum in the right ear of the patient, and that radiological investigation is crucial in clarifying the possible concomitant pathologies in cases of hearing loss.