PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin no greater than 2.5 mg/dL for liver metastases Renal: Creatinine no greater than 3.0 mg/dL Calcium at least 8.0 mg/dL but less than 12.0 mg/dL Cardiovascular: No history of severe cardiovascular disease within past 6 months (e.g., congestive heart failure) No hypertension refractory to treatment No symptomatic coronary artery disease Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No history of noncompliance to medical regimen