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 TumorCentral Nervous System NeoplasmsBone NeoplasmsThoracic NeoplasmsOrbital NeoplasmsIfosfamideNeuroblastomaOncogene Proteins, FusionParaparesisFatal OutcomeVincristineThoracic WallNeoplasms, Germ Cell and EmbryonalAstrocytomaImmunohistochemistryChromosomes, Human, Pair 11Tomography, X-Ray ComputedAbdominal NeoplasmsTumor Markers, BiologicalChromosomes, Human, Pair 17Translocation, GeneticTeratomaEtoposidePineal GlandCranial IrradiationNeurofilament ProteinsLomustineCombined Modality TherapyMagnetic Resonance ImagingCyclophosphamideThiotepaCentral Nervous SystemRhabdomyosarcomaSoft Tissue NeoplasmsIn Situ Hybridization, FluorescenceTumor Cells, CulturedAntineoplastic Combined Chemotherapy ProtocolsNervous SystemGene RearrangementDNA, NeoplasmGliomaTreatment OutcomeMaxillary NeoplasmsGene AmplificationPolymerase Chain Reaction