PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0 or 1 Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 1.5 mg/dL Renal: Creatinine no greater than 1.5 mg/dL OR Creatinine clearance at least 60 mL/min Calcium normal No history of hypercalcemia Cardiovascular: No history of ventricular arrhythmias or symptomatic bradyarrhythmia Other: No significant detectable infection Not pregnant or nursing No other active malignancies Fertile patients must use effective contraception