- Regimen B (multiple inoperable metastases, incomplete resection, or high-risk primary disease): Patients receive etoposide IV over 4 hours and carboplatin IV over 1 hour on days 1-3 of weeks 4, 10, 13, 16, 22, 25, 28, and 34. Patients also receive cyclophosphamide IV over 1 hour on days 1-3 and doxorubicin IV over 4-6 hours on day 1 of weeks 1, 7, 19, and 31. Some patients also undergo radiotherapy concurrently with chemotherapy for approximately 3 weeks.