PATIENT CHARACTERISTICS: Age: 18 and over Menopausal status: Not specified Performance status: ECOG 0-2 Life expectancy: At least 12 weeks Hematopoietic: Granulocyte count greater than 1500/mm3 Hemoglobin at least 9.0 g/dL Platelet count greater than 100,000/mm3 Hepatic: Bilirubin no greater than 1.3 mg/dL SGOT no greater than 3 times upper limit of normal (no greater than 5 times ULN if liver involvement) No Gilbert's disease Renal: Creatinine no greater than 2.0 mg/dL Calcium at least 12.0 mg/dL Cardiovascular: No myocardial infarction in the past 6 months No congestive heart failure requiring therapy Other: No active or uncontrolled infection HIV negative No psychiatric disorder that would preclude study No prior malignancy within the past 5 years except adequately treated basal cell or squamous cell skin cancer or carcinoma in situ of the cervix No history of seizures No uncontrolled diabetes mellitus (random blood sugar at least 200 mg) No other severe disease that would preclude study Not pregnant or nursing Fertile patients must use effective contraception