PATIENT CHARACTERISTICS: Age: 70 and under Performance status: WHO 0 or 1 Hematopoietic: WBC at least 3,500/mm3 Absolute neutrophil count at least 2,000/mm3 Platelet count at least 110,000/mm3 Hepatic: Not specified Renal: Creatinine no greater than 1.3 mg/dL Creatinine clearance at least 50 mg/mL BUN no greater than 50 mg/dL Cardiovascular: No cardiopathy Other: No significant internal disease No prior malignancy except basal cell carcinoma of the skin No geographic barrier to treatment