[Psoriasis exacerbated by alpha-interferon therapy in a case of chronic myelogenous leukemia].

A 49-year old male with chronic myelogenous leukemia (CML) and psoriasis was admitted for interferon treatment. He was given 6 MU of human lymphoblastoid interferon (HLBI), a natural alpha-interferon, daily for 1 month followed by 3 MU every other day for 1.5 months and twice a week for 1 month. Because HLBI administration showed no favorable effects on the hematological findings and because of the exacerbated psoriasis of the patient, it was discontinued. Subsequently his psoriasis improved to the initial findings observed at the admission. We reported a case of CML in which psoriasis was exacerbated during interferon therapy.