After chemotherapy, patients with an adequate response undergo radiotherapy. Patients with an inadequate response undergo high-dose chemotherapy comprising carmustine IV over 1-2 hours on day -7, etoposide IV and cytarabine IV over 30 minutes twice daily on days -6 to -3, and melphalan IV over 1½ hours on day -2. Patients then undergo autologous hematopoietic stem cell transplantation (HSCT).