PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-3 Hematopoietic: WBC at least 3,500 Platelets at least 130,000 Hepatic: Bilirubin no greater than 0.3 mg/dL above normal Renal: Creatinine no greater than 0.3 mg/dL above normal Cardiovascular: No NYHA class III/IV status Other: No uncontrolled infection No pregnant or nursing women Negative pregnancy test required of fertile women Effective contraception required of fertile patients