Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralApudomaNeuroectodermal Tumor, MelanoticBrain NeoplasmsSarcoma, EwingMedulloblastomaTumor Markers, BiologicalCerebellar NeoplasmsNeoplasmsSupratentorial NeoplasmsProto-Oncogene Protein c-fli-1RNA-Binding Protein EWSRetrospective StudiesPrognosisPinealomaChromosomes, Human, Pair 22EpendymomaSpinal Cord NeoplasmsBone NeoplasmsRhabdoid TumorNeuroblastomaTomography, X-Ray ComputedSarcoma, Small CellMaxillary NeoplasmsCell Line, TumorImmunohistochemistryTumor BurdenTumor Necrosis Factor-alphaNeoplasms, Germ Cell and EmbryonalFatal OutcomeThoracic NeoplasmsCentral Nervous System NeoplasmsOrbital NeoplasmsMagnetic Resonance ImagingAstrocytomaSkull NeoplasmsChromosomes, Human, Pair 11Carcinoid TumorWilms TumorCombined Modality TherapyTreatment OutcomeOncogene Proteins, FusionNeural PlateTeratomaAntigens, NeoplasmSoft Tissue NeoplasmsVincristineGenes, Tumor SuppressorNeoplasms, ExperimentalRhabdomyosarcomaIfosfamideGliomaTranslocation, GeneticDNA, NeoplasmTumor Suppressor Protein p53Abdominal NeoplasmsNeoplasm Recurrence, LocalBiopsyThoracic WallGanglioneuromaParaparesisNeuroendocrine TumorsNeoplasm ProteinsPolymerase Chain ReactionReverse Transcriptase Polymerase Chain ReactionNeoplasms, Nerve TissueAntineoplastic Combined Chemotherapy ProtocolsTumor Suppressor ProteinsCell DivisionCell Transformation, NeoplasticRNA, MessengerNeoplasm MetastasisEtoposideRetinoblastomaTime FactorsTumor MicroenvironmentChromosomes, Human, Pair 17Biopsy, NeedlePeripheral Nervous System NeoplasmsAntibodies, MonoclonalDisease ProgressionPineal GlandIn Situ Hybridization, FluorescenceAdenocarcinomaCyclophosphamideImmunoenzyme TechniquesNeoplasms, Complex and MixedSarcomaCranial IrradiationLipomaMammary Neoplasms, ExperimentalThoracic Surgical ProceduresNeurofilament ProteinsRetroperitoneal NeoplasmsHemangiopericytomaSurvival RateKidney NeoplasmsGene Expression Regulation, Neoplastic