PATIENT CHARACTERISTICS: Age: Over 18 Performance status: SWOG 0-2 Hematopoietic: Absolute neutrophil count at least 500/mm3 Platelet count at least 75,000/mm3 Hepatic: AST no greater than 1.5 times normal Alkaline phosphatase no greater than 1.5 times normal LDH no greater than 1.5 times normal PT/PTT normal Renal: Creatinine no greater than 2.0 times normal Creatinine clearance at least 60 mL/min Cardiovascular: No serious abnormalities on EKG No history of severe coronary artery disease No history of cardiomyopathy, congestive heart failure, or arrhythmia Other: No active uncontrolled infection No active second malignancy within 5 years except adequately treated nonmelanoma skin cancer or adequately treated carcinoma in situ of the cervix Not pregnant or nursing Fertile patients must use effective contraception