PATIENT CHARACTERISTICS: Age: Over 18 Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: WBC at least 2,500/mm3 Neutrophil count at least 1,000/mm3 Platelet count at least 50,000/mm3 Hemoglobin at least 9 g/dL Hematocrit at least 27% Hepatic: Bilirubin no greater than 2 times upper limit of normal (ULN) AST/ALT no greater than 2 times ULN Alkaline phosphatase no greater than 2.5 times ULN Renal: Creatinine no greater than 2 times ULN