All patients undergo peripheral blood stem cell or bone marrow harvest followed by high-dose chemotherapy consolidation. Patients receive thiotepa IV 3 times daily on days -7 to -3, carmustine IV over 1 hour on days -6 to -3, and etoposide IV over 5 hours on days -6 to -3. Patients then undergo transplantation on day 0. Filgrastim (G-CSF) is administered concurrently with stem cell harvesting and transplantation.