[Operative treatment of bone and soft tissue tumors involving pelvic region, especially retroperitoneal area including lumbar region].

During the past 17 years, 35 of 60 patients with malignant bone and soft tissue tumors of the pelvic and surrounding tissues, were treated surgically. There were 13 bone tumors and 22 soft tissue tumors, There were 12 recurrent cases and 23 non-recurrent cases with cumulative 5-year survival rates of 20% and 70%, respectively. In the tumors involved even in the iliolumbar area, curative resection was difficult with poor prognosis. Serious complications also developed with high incidence immediately after operation, including ileus, severe infections and postoperative bleeding. When the affected limb was preserved, many difficulties were encountered in functional recovery. Therefore, we combine preoperative radiation and intra arterial infusion for the prevention of recurrence at the resection margin. However, we have not obtained completely satisfying results. Operations involving these tumors should be performed in cooperation with other fields.