PATIENT CHARACTERISTICS: Age: 30 and under Performance status: Not specified Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin less than 3.0 times normal SGOT and/or SGPT less than 3.0 times normal Renal: Creatinine no greater than 1.5 times normal OR Creatinine clearance or radioisotope GFR greater than 70 mL/min Cardiovascular: Shortening fraction greater than 28% by echocardiogram OR Ejection fraction greater than 50% by radionuclide angiogram No history of pericarditis or myocarditis