- First course: Patients receive ifosfamide (IFF) IV continuously and etoposide (VP-16) IV over 2 hours every 12 hours on days 1-3. Filgrastim (G-CSF) is administered subcutaneously (SC) beginning on day 5 and continuing until blood counts recover and then autologous peripheral blood stem cells (PBSC) are harvested, selected for CD34 positive cells, and purged in vitro. If more than 5% of the WBC contains lymphoma cells after induction, then 2 courses of IFF and VP-16 are administered before PBSC harvest.