Within 6 weeks of surgery or when stable, patients begin induction chemotherapy comprising cisplatin IV over 6 hours on day 0; vincristine IV on days 0, 7, and 14; cyclophosphamide IV over 1 hour on days 1-2; and etoposide IV over 1 hour on days 0-2. Twenty four hours after the last cyclophosphamide dose, patients receive filgrastim (G-CSF) subcutaneously (SC) and undergo peripheral blood stem cell harvest 2 days later. Treatment repeats every 21 days for up to 3 courses in the absence of disease progression or unacceptable toxicity.