Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralSarcoma, EwingMedulloblastomaCerebellar NeoplasmsSupratentorial NeoplasmsBrain NeoplasmsRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1Neuroectodermal Tumor, MelanoticPinealomaEpendymomaSpinal Cord NeoplasmsChromosomes, Human, Pair 22Sarcoma, Small CellRhabdoid TumorBone NeoplasmsCentral Nervous System NeoplasmsOrbital NeoplasmsThoracic NeoplasmsIfosfamideOncogene Proteins, FusionFatal OutcomeNeuroblastomaParaparesisThoracic WallPrimitive StreakVincristineAstrocytomaTomography, X-Ray ComputedImmunohistochemistryNeoplasms, Germ Cell and EmbryonalTeratomaNeural PlateAbdominal NeoplasmsChromosomes, Human, Pair 17Chromosomes, Human, Pair 11EtoposideTranslocation, GeneticCranial IrradiationPineal GlandCombined Modality TherapySynaptophysinTreatment OutcomeNeurofilament ProteinsMagnetic Resonance ImagingLomustineTumor Markers, BiologicalCyclophosphamideThiotepaTumor Cells, CulturedCell DifferentiationNeoplasms, Nerve TissueRhabdomyosarcomaSoft Tissue NeoplasmsIn Situ Hybridization, FluorescenceAntineoplastic Combined Chemotherapy ProtocolsEctodermGene RearrangementGene AmplificationTranscription FactorsPrognosis