PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 60-100% ECOG 0-2 Life expectancy: Not specified Hematopoietic: WBC at least 3,000/mm3 Granulocyte count at least 1,500/mm3 Hemoglobin at least 9 g/dL Platelet count at least 100,000/mm3 Hepatic: Alkaline phosphatase no greater than 2.5 times upper limit of normal (ULN) AST no greater than 2.5 times ULN Bilirubin no greater than 1.5 times ULN Renal: Creatinine no greater than 1 times ULN Creatinine clearance at least 60 mL/min Calcium no greater than 11.5 mg/dL Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No other malignancy within the past 3 years except nonmelanoma skin cancer or carcinoma in situ of the cervix