Abstract
Thyroid autoimmunity and dysfunction have been widely reported as side effects of interferon-alpha (IFN-alpha) treatment, but the literature lacks data regarding the long-term course of these complications, clinical observation being limited to 6-12 months off therapy. Our study is the first that has aimed to evaluate the natural history of IFN-related thyroid autoimmunity during a 6.2-yr follow-up after the IFN-alpha withdrawal as well as to investigate the potential role of the autoantibody pattern at the end of treatment to predict the long-term outcome. Our study group included 114 patients (79 males, 35 females), mean age 48 yr (range 23-67 yr) with no preexisting thyroid disease, undergoing a 12-month treatment with recombinant IFN-alpha for C virus-related chronic active hepatitis. Thyroid autoimmunity (serum TgAb and TPOAb) and function (serum FT(4), FT(3), TSH) were retrospectively evaluated at the end of IFN therapy, 6 months after IFN withdrawal and after a median period of 6.2 yr (range 5.5-8.4 yr). At the end of treatment, 78 patients were negative for thyroid autoantibodies (Abs-) and all but one of them remained so for the following evaluations. The remaining 36 patients had thyroid autoantibodies (Abs+) at the e...Continue Reading
Citations
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