Interferon alpha (IFN-alpha) is an immunomodulator that is used as an antiviral agent in active chronic viral hepatitis C. IFN therapy can cause an induction or exacerbation of sarcoidosis. Although several reports in the gastroenterology literature have suggested an association between IFN therapy and sarcoidosis, this association has rarely been described elsewhere. A 47-year-old woman developed sarcoidosis after cessation of treatment with IFN and ribavirin for chronic hepatitis C. Her sarcoidosis showed liver, pulmonary and skin involvement. She continues to be monitored regularly in the Department of Pulmonary Diseases without steroid therapy. Her sarcoidosis improved spontaneously. We conclude that patients should be monitored for sarcoidosis during and after IFN therapy.
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