Adding lomustine to idarubicin and cytarabine for induction chemotherapy in older patients with acute myeloid leukemia: The BGMT 95 trial results

Abstract

Background and Objectives: Treatment of acute myeloid leukemia (AML) in older patients remains unsatisfactory. The BGMT 95 trial for older patients set out to improve the outcome of these patients by adding a third drug (lomustine) to a 5+7 idarubicin and cytarabine schedule at induction and evaluating intermediate-dose cytarabine as consolidation. Design and Methods: A multicenter randomized trial was performed comparing induction therapy with idarubicin and cytarabine, 5+7 (IC) to induction therapy with the same drugs plus lomustine (CCNU), 200 mg\m2 orally on day 1 (ICL). Patients in complete remission (CR) were then randomized to receive either maintenance therapy or intensification with intermediate-dose cytarabine and idarubicin followed by maintenance therapy. Results: Between 1995 and 2001, 364 patients (≥60 years) from ten centers were included. The CR rate was 58% for patients in the IC arm and 67% for patients in the ICL arm (p=0.104). The median overall survival (OS) was 7 and 12 months respectively (p=0.05), but OS at 2 years was not statistically different: 31±7% for patients in the ICL arm vs 24±6% for those in the IC arm. The two post-remission strategies yielded similar results. Interpretation and Conclusions: Adding lomustine to induction with idarubicin and cytarabine therapy did not statistically improve survival in elderly patients with AML. Adding intermediate-dose cytarabine to consolidation therapy did not improve outcome. ©2007 Ferrata Storti Foundation.