OUTLINE: Randomized study. Patients are randomized to Arm I or II; treatment should begin within 6 weeks of surgery. Regimens listed in Arm I are recommended, but other platinum-containing regimens are allowed provided the doses at a minimum meet those listed below. Arm I: Single-agent Chemotherapy or 3-Drug Combination Chemotherapy. Carboplatin, CBDCA, NSC-241240; or CAP: Cyclophosphamide, CTX, NSC-26271; Doxorubicin, DOX, NSC-123127; Cisplatin, CDDP, NSC-119875. Arm II: Observation. No adjuvant therapy.