- Arm II: Patients receive 2 courses of BEP and G-CSF as in arm I. Patients who have no marrow involvement with tumor undergo harvest of autologous bone marrow before the first or second course of BEP. Patients who have bone marrow involvement with tumor undergo harvest of G-CSF-mobilized autologous peripheral blood stem cells (PBSC) on days 17-21 of the first and/or second courses of BEP. When blood counts recover, patients receive high-dose intensification comprising carboplatin IV over 1 hour, VP-16 IV over 30-60 minutes, and cyclophosphamide IV over 1 hour on days -5 to -3. Autologous bone marrow or PBSC are reinfused over 15-20 minutes on day 0. G-CSF is administered SC beginning 24 hours after transplantation and continuing until blood counts recover. Beginning 1-3 weeks after hospital discharge for the first transplantation and after recovery from any toxic effects, patients with a Karnofsky performance status of 70-100% receive a second course of high-dose intensification plus a second bone marrow or PBSC transplantation in the absence of disease progression or unacceptable toxicity.