Neuroectodermal Tumors, Primitive, PeripheralNeuroectodermal Tumors, PrimitiveSarcoma, EwingNeuroectodermal TumorsSarcoma, Small CellProto-Oncogene Protein c-fli-1RNA-Binding Protein EWSBone NeoplasmsMedulloblastomaChromosomes, Human, Pair 22Cerebellar NeoplasmsSupratentorial NeoplasmsNeuroectodermal Tumor, MelanoticBrain NeoplasmsPinealomaEpendymomaSpinal Cord NeoplasmsRhabdoid TumorCentral Nervous System NeoplasmsThoracic NeoplasmsOrbital NeoplasmsIfosfamideOncogene Proteins, FusionNeuroblastomaParaparesisFatal OutcomeVincristineThoracic WallNeoplasms, Germ Cell and EmbryonalAstrocytomaImmunohistochemistry