Sarcoidosis is one of the possible rare complications of interferon-alpha (IFN-alpha) therapy. Only a few reports have been published on this disease, and these have been associated with the treatment of malignant diseases, essential thrombocytosis, and chronic hepatitis C. We report on a 64-year-old man with chronic hepatitis B (HBsAg, HBeAg, HBV DNA-positive) who was treated with recombinant IFN-alpha-2b (5 MU three times weekly) for 28 weeks. Tolerance to treatment was very good; only a mild flu-like syndrome appeared. Twelve months after completing the therapy, a chest X-ray was performed that revealed bilateral hilar masses, and high-resolution computed tomography (HRCT) of the chest indicated the presence of lymphadenopathy of the anterior and middle mediastinum. Therefore, a right-sided thoracoscopy was performed with excision of a 27-mm lymph node and a histological diagnosis of sarcoidosis was made. No medication for sarcoidosis was indicated. Complete normalization of mediastinal lymphadenopathy (verified on HRCT and chest X-ray) was confirmed 1 year following the thoracoscopy. To our knowledge, this is the first case wherein occurrence of sarcoidosis in a chronic hepatitis B patient treated with IFN-alpha is described. We suppose that IFN-alpha, as a potent stimulator of T-helper 1 (Th1) immune responses, may trigger the compartmentalized Th1 reaction that has been shown to take place in sarcoidosis.

Department of Infectious Diseases University Hospital Brno Jihlavská 20 639 00 Brno Czech Republic

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