Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsMedulloblastomaNeuroectodermal Tumors, Primitive, PeripheralCerebellar NeoplasmsNeuroectodermal Tumor, MelanoticSarcoma, EwingBrain NeoplasmsSupratentorial NeoplasmsProto-Oncogene Protein c-fli-1RNA-Binding Protein EWSPinealomaEpendymomaChromosomes, Human, Pair 22Spinal Cord NeoplasmsRadiation DosageRadiation, IonizingRhabdoid TumorNeuroblastomaBone NeoplasmsSarcoma, Small CellRadiation InjuriesMaxillary NeoplasmsTumor Markers, BiologicalCentral Nervous System NeoplasmsNeoplasms, Germ Cell and EmbryonalCranial IrradiationThoracic NeoplasmsCell Line, TumorDose-Response Relationship, RadiationCombined Modality TherapyAstrocytomaRadiation ToleranceImmunohistochemistryRadiationVincristineTomography, X-Ray ComputedNeural PlateChromosomes, Human, Pair 11Oncogene Proteins, FusionChromosomes, Human, Pair 17Orbital NeoplasmsTumor Cells, CulturedIfosfamideGliomaRadiation ProtectionFatal OutcomeEtoposideRadiation MonitoringTranslocation, GeneticSkull NeoplasmsTeratomaRhabdomyosarcomaTumor BurdenMagnetic Resonance ImagingThoracic WallGanglioneuromaParaparesisHedgehog ProteinsGene Expression Regulation, NeoplasticNeoplasm Recurrence, LocalGenes, mycLomustineTreatment OutcomeDNA, NeoplasmAntineoplastic Combined Chemotherapy ProtocolsAntigens, NeoplasmCyclophosphamideReverse Transcriptase Polymerase Chain ReactionNeoplasms, Nerve TissuePeripheral Nervous System NeoplasmsIn Situ Hybridization, FluorescenceTumor Necrosis Factor-alphaAbdominal NeoplasmsPineal GlandRetinoblastomaPrognosisNeurofilament ProteinsThiotepaCell Transformation, NeoplasticSurvival AnalysisTranscription FactorsRNA, MessengerThoracic Surgical ProceduresNeoplasm ProteinsCell DivisionGangliosidesCell ProliferationCell DifferentiationAntineoplastic AgentsTumor Suppressor Protein p53Soft Tissue NeoplasmsInfratentorial NeoplasmsRadiotherapy DosageSurvival RateImmunoenzyme TechniquesDisease-Free SurvivalPolymerase Chain ReactionPhosphopyruvate HydrataseNeoplasms