RADIOLOGIC FINDINGS IN COCHLEAR OTOSCLEROSIS: DIFFERENTIAL DIAGNOSIS OF SENSORINEURAL DEAFNESS DUE TO COCHLEAR OTOSPONGIOSIS AND UNKNOWN SENSORINEURAL HEARING LOSS

Pedachenko Anastasia, Soushko Yuri

60 patients with sensorineural hearing loss were examined using CT scan. 30 patients with mixed hearing loss (ankilo-sis of stapes with hearing sensitivity impairment) and 30 patients with pure sensorineural hearing loss of unknown etiology (in this group were included the patients whose anamnesis indicated the possible cochlear otosclerosis). The obtained results revealed that 23 of patients with alterations of hearing sensitivity of unknown genesis had focuses of ostodistrophy in the bone capsule of the inner ear. The patients with the mixed hearing loss in all cases displayed invasion by otosclerosis of the cochlear. The patients with mixed form of otosclerosis and the patients with sen-sorneural hearing loss caused by otosclerosis had the same rate of cases with different level of heaviness and character of changes in the bone capsule of labyrinth.