[Cormobidity of sensorineural hearing loss and other autoimmune diseases. Usefulness of laboratory tests].
OBJECTIVES: To value if the sensorineural hearing loss (SHL) in several autoimmune diseases (AD) is also secondary to immunomediation. PATIENTS AND METHODS: In 342 cases with SHL and any AD and 301 normoacoustic controls with AD a non-specific immunologic battery of tests and a Western-blot (WB) for anticochlear autoantibodies were developed, and cases with SHL were treated with deflazacort. RESULTS: Alterations in non-specific battery were similar between cases and controls. But a 12,5% of cases with SHL and a 1,6% of normoacoustic showed a positive WB (p<0,001). Steroid therapy improved hearing in 14,3% of cases. In them, sensitivity and specificity of non-specific battery were 78,4% and 75,5%, respectively, to predict response to therapy. These were 98,9% and 81,6% for WB. CONCLUSIONS: The SHL in cases with AD can be considered immunomediated in a discrete average, but the diagnostic efficiency of WB to predict an improvement after steroid therapy is high.