HRCT Findings of Otosclerosis / 대한이비인후과학회지

ABSTRACT

BACKGROUND AND OBJECTIVES: With advances in techniques in the field of otology, we can now offer better treatment to patients with the conductive hearing loss. Otosclerosis is rare in the mongoloids so the diagnosis and treatment modality are not well established yet. In this study, we reviewed high resolution computerized tomography (HRCT) of patients with otsclerosis who were confirmed through explotympanotomy and found that there were specific radiological finding relevant to otsclerosis. The purpose of this study was to understand the HRCT findings of otosclerosis in order to provide more information about the disease. MATERIALS AND METHODS: We selected 42 HRCT available patients of 126 patients who were operated in the Seoul National university hospital from January 1981 to December 2000. We used GE HIGH SPEED ADVANTAGE (scan thickness 1 mm, scan interval 1 mm) CT scanner. RESULTS: There were radiolucent lesions in 48 ears(62%). The lesions were found in the fissula ante fenestram, cochlea, and the semicircular canal. CONCLUSIONS: HRCT could be used as an adjunctive diagnostic tool for the detection of otosclerotic lesion, stapedial or cochlear. We could find positive findings in 62% of the patients who showed progressive and conductive hearing loss.