EURAMOS-1, an international randomised study for osteosarcoma : results from pre-randomisation treatment

Peer reviewe

Methotrexate, Doxorubicin, and Cisplatin (MAP) Plus Maintenance Pegylated Interferon Alfa-2b Versus MAP Alone in Patients With Resectable High-Grade Osteosarcoma and Good Histologic Response to Preoperative MAP: First Results of the EURAMOS-1 Good Response Randomized Controlled Trial

PURPOSE: EURAMOS-1, an international randomized controlled trial, investigated maintenance therapy with pegylated interferon alfa-2b (IFN-alpha-2b) in patients whose osteosarcoma showed good histologic response (good response) to induction chemotherapy. PATIENTS AND METHODS: At diagnosis, patients age /= two cycles of preoperative MAP (methotrexate, doxorubicin, and cisplatin), macroscopically complete surgery of primary tumor, /= 3 toxicity during IFN-alpha-2b treatment. With median follow-up of 44 months, 3-year EFS for all 716 randomly assigned patients was 76% (95% CI, 72% to 79%); 174 EFS events were reported (MAP, n = 93; MAP plus IFN-alpha-2b, n = 81). Hazard ratio was 0.83 (95% CI, 0.61 to 1.12; P = .214) from an adjusted Cox model. CONCLUSION: At the preplanned analysis time, MAP plus IFN-alpha-2b was not statistically different from MAP alone. A considerable proportion of patients never started IFN-alpha-2b or stopped prematurely. Long-term follow-up for events and survival continues