PATIENT CHARACTERISTICS: Age: Under 19 at time of diagnosis Performance status: Not specified Life expectancy: Not specified Hematopoietic: Hemoglobin normal for age WBC normal for age Platelet count normal for age Hepatic: Bilirubin less than 1.5 times upper limit of normal (ULN) for age SGOT less than 1.5 times ULN for age Renal: Creatinine less than 1.5 times ULN for age