PATIENT CHARACTERISTICS: Age: Under 70 Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: Neutrophil count at least 2000/mm3 Platelet count at least 100,000/mm3 Hemoglobin at least 10 g/dL Hepatic: (Unless caused by liver metastases) Bilirubin no greater than 1.25 times upper limit of normal (ULN) SGOT or SGPT no greater than 1.25 times ULN Renal: Creatinine no greater than 1.25 times ULN Other: No prior or concurrent malignancy except basal or squamous cell skin cancer or carcinoma in situ of the cervix