PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Not specified Hematopoietic: Not applicable Hepatic: Bilirubin no greater than 2 x normal Alkaline phosphatase no greater than 2 x normal Renal: Creatinine no greater than 1.7 mg/dl (150 micromoles/liter) OR Creatinine clearance at least 60 ml/min Cardiovascular: No uncontrolled hypertension No other severe cardiac disease Pulmonary: No severe pulmonary disease Other: No known intolerance to any study drug No uncontrolled severe infection Not HIV seropositive No severe neurologic or metabolic disease No concomitant malignancy except: Nonmelanomatous skin cancer In situ cervical carcinoma No pregnant women