Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralNeuroectodermal Tumor, MelanoticSarcoma, EwingMedulloblastomaCerebellar NeoplasmsSupratentorial NeoplasmsBrain NeoplasmsProto-Oncogene Protein c-fli-1RNA-Binding Protein EWSPinealomaChromosomes, Human, Pair 22EpendymomaSpinal Cord NeoplasmsSarcoma, Small CellBone NeoplasmsNeuroblastomaRhabdoid TumorMaxillary NeoplasmsTumor Markers, BiologicalNeoplasms, Germ Cell and EmbryonalThoracic NeoplasmsCentral Nervous System NeoplasmsNeural PlateChromosomes, Human, Pair 11Oncogene Proteins, FusionAstrocytomaImmunohistochemistryOrbital NeoplasmsVincristineTomography, X-Ray ComputedIfosfamideFatal OutcomeCell Line, TumorTranslocation, GeneticGanglioneuromaSkull NeoplasmsParaparesisThoracic WallTeratomaNeoplasms, Nerve TissueChild WelfareCombined Modality TherapyMagnetic Resonance ImagingPeripheral Nervous System NeoplasmsEtoposideRhabdomyosarcomaTumor Necrosis Factor-alphaTumor BurdenPineal GlandAntigens, NeoplasmChromosomes, Human, Pair 17Abdominal NeoplasmsGliomaTreatment OutcomeRetinoblastomaCranial IrradiationNeurofilament ProteinsThoracic Surgical ProceduresTumor Cells, CulturedDisabled ChildrenDNA, NeoplasmChild BehaviorCyclophosphamideGangliosidesSoft Tissue NeoplasmsPhosphopyruvate HydrataseLomustineIn Situ Hybridization, FluorescenceSynaptophysinGenes, mycAntineoplastic Combined Chemotherapy ProtocolsReverse Transcriptase Polymerase Chain ReactionPolymerase Chain ReactionWilms TumorNeoplasm Recurrence, LocalThiotepaNeoplasm ProteinsCell DivisionRNA, MessengerCell Transformation, NeoplasticTranscription FactorsEctodermAntibodies, MonoclonalImmunoenzyme TechniquesCell DifferentiationGene AmplificationTime FactorsMolecular Sequence DataPrognosisDisease ProgressionGene Expression Regulation, NeoplasticNeoplasmsNeoplasms, ExperimentalGenes, Tumor SuppressorBase SequenceRetrospective StudiesSurvival AnalysisBiopsy