DISEASE CHARACTERISTICS: Histologically proven high risk Ewing's family of tumors: Ewing's sarcoma of bone Extraosseous Ewing's sarcoma Peripheral neuroepithelioma Must have one of the following characteristics: Metastatic disease at diagnosis Primary tumor of the humerus, femur, or trunk Bulky (greater than 8 cm) tumor Elevated LDH prior to biopsy (at least 900 IU/mL)