Neuroectodermal Tumors, PrimitiveSupratentorial NeoplasmsNeuroectodermal TumorsMedulloblastomaNeuroectodermal Tumors, Primitive, PeripheralBrain NeoplasmsCerebellar NeoplasmsSarcoma, EwingNeuroectodermal Tumor, MelanoticRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1EpendymomaPinealomaSpinal Cord NeoplasmsChromosomes, Human, Pair 22Sarcoma, Small CellRhabdoid TumorBone NeoplasmsCentral Nervous System NeoplasmsThoracic NeoplasmsAstrocytomaOrbital NeoplasmsIfosfamide