PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: At least 12 weeks Hematopoietic: WBC at least 3,500/mm3 Granulocyte count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hemoglobin greater than 9.0 g/dL Hepatic: Bilirubin normal PT normal OR INR less than 1.1 PTT normal Renal: Creatinine less than 1.5 mg/dL AND/OR Creatinine clearance greater than 60 mL/min Cardiovascular: No New York Heart Association class III or IV heart disease No uncompensated coronary artery disease on electrocardiogram or physical exam No myocardial infarction or severe or unstable angina within the past 6 months No severe peripheral vascular disease associated with diabetes mellitus No deep vein thrombosis or arterial thrombosis within the past 3 months Pulmonary: No pulmonary embolism within the past 3 months Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception