Beginning on day 35 of induction chemotherapy, patients receive consolidation therapy comprising CTX IV over 20-30 minutes on days 0 and 28; oral MP on days 0-13 and 28-41; ARA-C IV or SC daily on days 0-3, 7-10, 28-31, and 35-38; VCR IV on days 14, 21, 42, and 49; and PEG-ASP IM on days 14 and 42. Patients without CNS disease at diagnosis receive MTX IT on days 7, 14, and 21. Patients with CNS disease at diagnosis receive MTX IT on day 7 and cranial irradiation as in the randomized treatment section. Patients with testicular leukemia receive radiotherapy as in the randomized treatment section.