PATIENT CHARACTERISTICS: Age: Over 18 Performance status: SWOG 0-2 Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin no greater than 3 times institutional normal Transaminases no greater than 3 times institutional normal Renal: Creatinine clearance greater than 40 mL/min Cardiovascular: Adequate cardiac function No heart failure Pulmonary: Adequate pulmonary function not requiring supplemental oxygen Other: Not pregnant Fertile patients must use adequate contraception