TRIM33 and dermatomyositis: Intravenous immunoglobulin (20 g/day for 5 days) and methylprednisolone pulse therapy (1000 mg/day for 3 days) was administered, and the symptoms gradually improved with a decrease in the TIF1-γ Ab titer (111 and 84 indices at one and three months after the development of dermatomyositis, respectively).