Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralSarcoma, EwingMedulloblastomaCerebellar NeoplasmsSupratentorial NeoplasmsNeuroectodermal Tumor, MelanoticBrain NeoplasmsRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1PinealomaEpendymomaSpinal Cord NeoplasmsChromosomes, Human, Pair 22Sarcoma, Small CellRhabdoid TumorBone NeoplasmsCentral Nervous System NeoplasmsThoracic NeoplasmsOrbital NeoplasmsIfosfamideOncogene Proteins, FusionNeuroblastomaParaparesisFatal OutcomeVincristineThoracic WallNeoplasms, Germ Cell and EmbryonalAstrocytomaImmunohistochemistryTomography, X-Ray ComputedAbdominal NeoplasmsChromosomes, Human, Pair 11Tumor Markers, BiologicalChromosomes, Human, Pair 17Translocation, GeneticEtoposideTeratomaPineal GlandCranial IrradiationNeurofilament ProteinsLomustineCombined Modality TherapyMagnetic Resonance ImagingCyclophosphamideThiotepaRhabdomyosarcomaTumor Cells, CulturedSoft Tissue NeoplasmsIn Situ Hybridization, FluorescenceAntineoplastic Combined Chemotherapy ProtocolsDNA, NeoplasmGene RearrangementTreatment OutcomeGliomaMaxillary NeoplasmsGene AmplificationPolymerase Chain ReactionNeoplasm Recurrence, Local