PATIENT CHARACTERISTICS: Age: 15 and over Performance status: WHO 0-1 Life expectancy: Not specified Hematopoietic: Absolute neutrophil count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than 1.8 mg/dL Albumin at least 25 g/L Renal: Creatinine no greater than 1.4 mg/dL OR Creatinine clearance greater than 65 mL/min Cardiovascular: No history of cardiovascular disease Other: No prior or concurrent second primary malignant tumors except adequately treated carcinoma in situ of the cervix or basal cell carcinoma No other severe illness (including psychosis) Not pregnant Fertile patients must use effective contraception during and for 6 months following study