抄録
Leiomyosarcomas, occurre in middle age and most common on the extremities, develop as solitary painful or tender intra-or subcutaneous nodules showing a relatively benign biologic course. We reported a 39-y-old female with intracutaneous leiomyosarcoma seen in the left inguinal region. She was in good health. First total resection was done under the diagnosis of infectious atheroma because of painful subcutaneous nodule, but histopathological feature showed that tumor nest consist of a poorly delineated proliferation of spindle-shaped atypical myomatous cells arranged in interlacing fascicle with positive smooth muscle actin stain. Wide local excision was carried out after the diagnosis. No recurrence was noted one year after the excision. [Skin Cancer (Japan) 2001; 16: 128-131]