Abstract
Extraskeletal Ewing's sarcoma is a rare soft tissue tumor composed of small round cells. We report a case of extraskeletal Ewing's sarcoma in the left thigh.
Chemotherapy, radiation therapy and hyperthermic therapy were performed preoperatively. On MRI taken after preoperative treatment, the tumor was decreased in size and was not enhanced by Gd-DTPA. These findings suggest that the tumor was necrosed by the preoperative treatments. MRI was very useful for showing the tumor area and for assessing the preoperative therapeutic effects.