OUTLINE: Patients with prior radiotherapy (greater than 2,000 cGy) receive cyclophosphamide IV over 2 hours and etoposide IV over at least 30 minutes on days -7 through -4 followed by carmustine IV over 2 hours on day -3. Patients receive allogeneic or autologous bone marrow transplantation on day 0. Patients with or without prior radiotherapy (less than 2,000 cGy) receive cyclophosphamide IV over 2 hours on days -8 through -5 followed by total body irradiation on days -4 through -1. Patients receive allogeneic or autologous bone marrow transplantation on day 0. Prior to autologous bone marrow transplantation and following myeloablative chemotherapy, patients undergo mobilization consisting of cytarabine subcutaneously every 12 hours for 6 doses. Approximately 24 hours later, patients receive sargramostim (GM-CSF) subcutaneously. Peripheral blood stem cells are collected every 1-3 days beginning when blood counts recover and continuing until sufficient number of cells are reached.