A multicenter randomized trial comparing induction therapy (IC: Idarubicin and Cytarabine, 5 + 7) to ICL (the same drugs plus lomustine (CCNU), 200 mg/m2 orally at day 1). Patients in complete remission (CR) will then receive a post-remission schedule with or without lomustine according to randomization. Patients from 60 to 65 years old will be proposed to reduced conditioning allogeneic transplantation after first consolidation.