PATIENT CHARACTERISTICS: Age: Not specified Performance Status: ECOG 0-2 Life Expectancy: At least 3 months Hematopoietic: WBC at least 3,000/mm3 Hemoglobin greater than 10 g/dL Platelet count greater than 100,000/mm3 Hepatic: Bilirubin less than 2.0 mg/dL Renal: Creatinine less than 2.0 mg/dL Cardiovascular: No prior history of myocardial infarction within previous 6 months No uncompensated congestive heart failure No primary (not due to electrolytes or drugs) cardiac arrhythmias besides premature ventricular contractions Pulmonary: No dyspnea at rest or need for supplemental oxygen Patients with symptomatic lung disease or extensive lung metastases must have oxygen saturation greater than 90% Other: Not pregnant or nursing Negative pregnancy test Patients with elevated temperatures greater than 100.5 F must have no occult infection