OUTLINE: Patients undergo treatment on Regimen A consisting of surgical resection of tumor as appropriate for disease followed by chemotherapy with cyclophosphamide IV over 20 minutes on day 1, carboplatin IV on day 2, and etoposide IV on days 2-4. Patients receive filgrastim (G-CSF) subcutaneously (SQ) daily beginning 24-48 hours following the last dose of etoposide and continuing for 14 days or until blood counts recover (a total of 28 days). Chemotherapy repeats every 3 weeks for 4 courses in the absence of disease progression. At week 11, patients undergo second look surgery to evaluate response and resect any residual disease. Patients with no residual disease receive no further therapy. Patients with good partial response or no response receive salvage chemotherapy on Regimen B. Patients receive salvage chemotherapy on Regimen B consisting of dactinomycin IV on days 1-3, doxorubicin IV and vincristine IV continuously on days 1-3, and G-CSF SQ daily beginning 24-48 hours following last dose of vincristine and continuing for 14 days or until blood counts recover. At week 3, patients receive cyclophosphamide IV on days 1-2, vincristine IV and doxorubicin IV continuously on days 1-3 and G-CSF as previously given in Regimen B. At week 6, patients receive methotrexate IV on day 1 and leucovorin calcium orally or IV every 6 hours for 3 days, beginning 16 hours after the completion of methotrexate. At week 8, salvage chemotherapy repeats for an additional course. Patients achieving complete response following salvage chemotherapy receive no further therapy. Patients with no response are removed from study.