PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: See Disease Characteristics Hepatic: SGOT and SGPT no greater than 3 times upper limit of normal (ULN) (no greater than 5 times ULN if liver involvement) Bilirubin no greater than 3 times ULN Renal: Creatinine no greater than 2 times ULN Cardiovascular: No grade 3 or 4 cardiac disease Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective barrier contraception during and for at least 2 weeks after study for women and for at least 3 months after study for men No history of noncompliance with medical regimens No serious concurrent medical condition