Abstract
A 32-year-old housewife developed sudden bilateral hearing loss. Hearing of the right ear was improved by steroid administration but not that of the left ear. A 37-year-old male printer lost the hearing of his right ear after diving. Exploratory tympanotomy proved rupture of the round window, which was closed with perichondrium. However, no improvement of hearing had occurred four weeks after the operation. Steroid therapy was tried and his hearing improved. The hearing of these two patients was depended on the dose of steroid : an increase in the dose improved hearing and a decrease worsened it. The etiology of this disease is not clear, but may be related to autoimmunity.
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