Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralSarcoma, EwingMedulloblastomaMesenchymomaCerebellar NeoplasmsSupratentorial NeoplasmsNeuroectodermal Tumor, MelanoticBrain NeoplasmsRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1PinealomaNeoplasms, Connective TissueEpendymomaSpinal Cord NeoplasmsChromosomes, Human, Pair 22Sarcoma, Small CellBone NeoplasmsRhabdoid TumorNeoplasms, Connective and Soft TissueCentral Nervous System NeoplasmsThoracic NeoplasmsTumor Markers, BiologicalIfosfamideImmunohistochemistryGastrointestinal Stromal TumorsOrbital NeoplasmsNeuroblastomaOncogene Proteins, FusionParaparesisFatal OutcomeTomography, X-Ray ComputedNeoplasms, Germ Cell and EmbryonalVincristineThoracic WallAstrocytomaChromosomes, Human, Pair 11RhabdomyosarcomaSoft Tissue NeoplasmsAbdominal NeoplasmsChromosomes, Human, Pair 17TeratomaEtoposideTranslocation, GeneticPineal GlandCranial IrradiationCombined Modality TherapyLomustineNeurofilament ProteinsMagnetic Resonance ImagingIn Situ Hybridization, FluorescenceCyclophosphamideThiotepaOsteomalaciaAntineoplastic Combined Chemotherapy ProtocolsTreatment OutcomeDNA, NeoplasmTumor Cells, CulturedGliomaNeoplasms, Nerve TissueGene RearrangementCell Line, TumorGene AmplificationPolymerase Chain ReactionMaxillary NeoplasmsSarcomaGene Expression Regulation, NeoplasticLipomaPrognosisBiopsyNeoplasms, Muscle TissueNeoplasm Recurrence, LocalReverse Transcriptase Polymerase Chain ReactionProto-Oncogene Proteins c-kitTumor Necrosis Factor-alphaTumor BurdenChromosome DeletionDisease ProgressionSurvival AnalysisTranscription FactorsGastrointestinal NeoplasmsHMGA2 Protein