Screening: 2 weeks before treatment Treatment: 2 years of systemic treatment according to PETHEMA LAL-RI-08 Protocol (Induction, Consolidation 1 and 2, Maintenance-1 with reinductions and maintenance 2 with no reinductions). Patients will receive DepoCyte® in Induction, Consolidation 1 and 2 and Maintenance 1 (first year). Patients will not receive DepoCyte® in Maintenance-2 (second year).