Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralSarcoma, EwingMedulloblastomaMesenchymomaCerebellar NeoplasmsSupratentorial NeoplasmsLiposarcoma, MyxoidNeuroectodermal Tumor, MelanoticBrain NeoplasmsRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1PinealomaChromosomes, Human, Pair 22EpendymomaNeoplasms, Connective TissueSpinal Cord NeoplasmsBone NeoplasmsNeoplasms, Connective and Soft TissueSarcoma, Small CellRhabdoid TumorCentral Nervous System NeoplasmsThoracic NeoplasmsImmunohistochemistryTumor Markers, BiologicalOncogene Proteins, FusionIfosfamideGastrointestinal Stromal TumorsOrbital NeoplasmsSoft Tissue NeoplasmsTomography, X-Ray ComputedNeuroblastomaVincristineFatal OutcomeParaparesisNeoplasms, Germ Cell and EmbryonalAstrocytomaThoracic WallTranslocation, GeneticChromosomes, Human, Pair 11RhabdomyosarcomaNeoplasm MetastasisTeratomaChromosomes, Human, Pair 17EtoposideCombined Modality TherapyPineal GlandIn Situ Hybridization, FluorescenceCranial IrradiationMagnetic Resonance ImagingPrimitive StreakCyclophosphamideLomustineNeurofilament ProteinsTreatment OutcomeThiotepaOsteomalaciaAntineoplastic Combined Chemotherapy ProtocolsTumor Cells, CulturedDNA, NeoplasmLipomaSarcomaGene RearrangementGliomaPrognosisNeoplasms, Nerve TissueNeuroendocrine TumorsPolymerase Chain ReactionInfant, NewbornBiopsyCell Line, TumorReverse Transcriptase Polymerase Chain ReactionGene AmplificationMaxillary NeoplasmsGene Expression Regulation, NeoplasticFibromaNeoplasm Recurrence, LocalProto-Oncogene Proteins c-kitSurvival AnalysisMolecular Sequence DataTranscription FactorsNeoplasms, Muscle TissueSynaptophysinChondrosarcomaTumor Necrosis Factor-alphaTumor BurdenChromosome DeletionChromosome AberrationsDisease Progression