Treatment of extremity soft tissue sarcomas with surgery and radiotherapy.

The results of treatment with a combination of surgery and radiotherapy of 102 patients with nonmetastatic extremity soft tissue sarcoma are reported. Seventy-nine patients were previously untreated and 23 had locally recurrent disease. Sixty-six tumours were situated in the lower limb and 16 in the limb girdles. Fifty-nine were high grade lesions, and 64 were over 5 cm in length. Surgical clearance was "good" (wide or radical) in only 34 cases. Sixty-eight patients received post-operative irradiation, 23 pre-operative irradiation and 11 both pre- and post-operative radiotherapy. Seventeen patients subsequently developed local recurrence and 9 of these remain disease-free after further surgery. Actuarial 5 year local control and disease-free survival rates for new cases were 87 and 65.4%; and for previously recurrent cases these figures fell to 75 and 54.8%. Following a univariate analysis of patient, tumour, surgical and radiotherapeutic factors only previous local recurrence (p less than 0.1 greater than 0.05) was found to significantly increase the risk of further local relapse. Multivariate analysis found high tumour grade [relative risk (RR) 8.4], tumour size greater than 15 cm (RR 3.66), previous local recurrence (RR 6.47) and proximal site (RR 12.7) to be independent poor risk factors for survival.