PATIENT CHARACTERISTICS: Age: 16 and over Performance status: WHO 0-1 Life expectancy: Not specified Hematopoietic: WBC at least 3,000/mm3 Platelet count at least 120,000/mm3 Hepatic: Bilirubin no greater than 1.25 times normal Renal: Creatinine no greater than 1.6 mg/dL OR Creatinine clearance at least 60 mL/min Cardiovascular: No history of cardiovascular disease Other: No other severe medical illness (including psychosis) No prior or concurrent other primary malignancy except adequately treated carcinoma in situ of the cervix or basal cell carcinoma