Patients receive ifosfamide IV over 1-2 hours on days 1-3 every 3 weeks, teniposide IV over 2 hours on day 1 every 3 weeks, and paclitaxel IV over 1 hour weekly. Patients who are not candidates for stem cell transplant continue treatment for 120 days in the absence of disease progression or unacceptable toxicity. Patients proceeding to stem cell transplant continue treatment for 36 days. Peripheral blood stem cells (PBSC) may be harvested at this time if autologous transplant is planned. Transplant patients may then continue with chemotherapy or proceed to autologous or allogeneic PBSC transplant.