PATIENT CHARACTERISTICS: Age: 18 and over Performance status: CALGB 0-2 Life expectancy: Not specified Hematopoietic: Granulocyte count at least 1500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin less than 1.5 mg/dL SGOT less than 2 times the upper limit of normal (ULN) Renal: Creatinine no greater than 2 times ULN Other: No prior or concurrent malignancy except: Curatively treated carcinoma in situ of the cervix Curatively treated breast cancer Curatively treated basal cell or squamous cell skin cancer At least 5 years since any nonrecurrent primary tumor surgically resected without administration of adjuvant radiation therapy or chemotherapy HIV negative