PATIENT CHARACTERISTICS: Age: 15 and over Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: Absolute neutrophil count at least 500/mm3* Platelet count at least 50,000/mm3* *Unless caused by marrow infiltration by tumor No congenital bleeding disorder Hepatic: Bilirubin less than 2 times upper limit of normal (ULN) SGOT less than 3 times ULN Renal: Creatinine clearance greater than 25 mL/min Cardiovascular: No myocardial infarction, stroke, or unstable angina within the past 12 months No uncompensated congestive heart failure Left ventricular ejection fraction at least 40% Other: No active infection HIV negative HTLV I/II negative Not pregnant Fertile patients must use effective contraception during and for 2 years following study