A trial of chemotherapy in patients with osteosarcoma

Two hundred and thirty five patients with osteosarcoma, aged less than 40 years, and treated by amputation or radiotherapy, were entered in a randomised trial of two forms of adjuvant chemotherapy. A two drug regimen, namely vincristine 2 mg m-2 (maximum 2mg) followed by methotrexate 200 mgm-2, given every three weeks, was compared with a three drug regimen, comprising the same vincristine-methotrexate treatment, alternating every three weeks with doxorubicin 60 mg m-2. Both regimens were continued for 54 weeks. Forty-one patients were excluded, most because of inadequate histology, leaving 194 patients for analysis. One hundred and seventy of these had immediate amputation, 14 were treated by a policy of radiotherapy, with surgery delayed for 9 months, provided no distant metastases had appeared, and 10 by a policy of radiotherapy only. Patients have been followed-up for between 26 and 94 months after entry to the trial. The 2- and 5-year survival rates were 48% and 27%. No significant difference in survival was observed between the two regimens, but toxicity was less with the two drug regimen.