Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralOligodendrogliomaNeuroectodermal Tumor, MelanoticBrain NeoplasmsChromosomes, Human, Pair 19Sarcoma, EwingAstrocytomaMedulloblastomaChromosomes, Human, Pair 1Supratentorial NeoplasmsCerebellar NeoplasmsEpendymomaProto-Oncogene Protein c-fli-1RNA-Binding Protein EWSGliomaPinealomaCentral Nervous System NeoplasmsChromosomes, Human, Pair 22Tumor Markers, BiologicalLomustineRadiation DosageRadiation, IonizingLoss of HeterozygosityNervous System NeoplasmsSpinal Cord NeoplasmsSarcoma, Small CellImmunohistochemistryBone NeoplasmsNeuroblastomaChromosome DeletionMaxillary NeoplasmsRhabdoid TumorRadiation InjuriesIn Situ Hybridization, FluorescenceThoracic NeoplasmsVincristineNeoplasms, Germ Cell and EmbryonalDNA Modification MethylasesIsocitrate DehydrogenaseDose-Response Relationship, RadiationGlial Fibrillary Acidic ProteinGlioblastomaMagnetic Resonance ImagingRadiation ToleranceNeural PlateRadiationChromosomes, Human, Pair 10Chromosomes, Human, Pair 11DNA, NeoplasmTomography, X-Ray ComputedOncogene Proteins, FusionCombined Modality TherapyPrognosisOrbital NeoplasmsCell Line, TumorTumor Suppressor ProteinsIfosfamideProcarbazineRadiation ProtectionFatal OutcomeNeoplasm Recurrence, LocalSurvival AnalysisTumor Suppressor Protein p53Polymerase Chain ReactionRadiation MonitoringTranslocation, GeneticSkull NeoplasmsGene Expression Regulation, NeoplasticReverse Transcriptase Polymerase Chain ReactionThoracic WallGanglioneuromaParaparesisChromosome AberrationsGene AmplificationGenes, Tumor SuppressorDNA Repair EnzymesCranial IrradiationTumor BurdenMeningiomaTeratomaNeoplasms, Nerve TissueEtoposideSurvival RatePeripheral Nervous System NeoplasmsDisease-Free SurvivalTumor Cells, CulturedTumor Necrosis Factor-alphaAbdominal NeoplasmsAntigens, NeoplasmRhabdomyosarcomaPineal GlandChromosomes, Human, Pair 17RetinoblastomaNeurofilament ProteinsTreatment OutcomeMutationThoracic Surgical ProceduresCyclophosphamide