A 71-year-old man from the Miyako Islands of Okinawa, Japan, had sarcoidosis affecting the peripheral nerves and kidneys. He had been treated with methylprednisolone pulse therapy and subsequently oral prednisolone at a maximum of 50 mg/day (1 mg/kg per day) and azathioprine at a maximum of 100 mg/day, with doses adjusted according to symptoms.Approximately 2.5 months after treatment initiation, under treatment with prednisolone 40 mg/day and mizoribine 150 mg/day, he developed several neck, waist and lumbar nodules. Histological examination showed proliferation of