Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralMedulloblastomaSarcoma, EwingCerebellar NeoplasmsSupratentorial NeoplasmsNeuroectodermal Tumor, MelanoticBrain NeoplasmsRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1PinealomaEpendymomaSpinal Cord NeoplasmsChromosomes, Human, Pair 22Sarcoma, Small CellRhabdoid TumorCentral Nervous System NeoplasmsBone NeoplasmsNeuroendocrine TumorsThoracic NeoplasmsOrbital NeoplasmsIfosfamideTumor Markers, BiologicalNeuroblastomaOncogene Proteins, FusionParaparesisFatal OutcomeNeoplasms, Germ Cell and EmbryonalVincristineThoracic WallAstrocytomaImmunohistochemistryTomography, X-Ray ComputedChromosomes, Human, Pair 11Abdominal NeoplasmsChromosomes, Human, Pair 17TeratomaEtoposideTranslocation, GeneticPineal GlandCranial IrradiationCombined Modality TherapyLomustineNeurofilament ProteinsMagnetic Resonance ImagingCyclophosphamideRhabdomyosarcomaThiotepaSoft Tissue NeoplasmsIn Situ Hybridization, FluorescenceAntineoplastic Combined Chemotherapy ProtocolsDNA, NeoplasmTumor Cells, CulturedGliomaTreatment OutcomeGene RearrangementGene AmplificationPrognosisPolymerase Chain ReactionMaxillary NeoplasmsCell Line, TumorNeoplasm Recurrence, LocalPancreatic NeoplasmsReverse Transcriptase Polymerase Chain ReactionTumor Necrosis Factor-alphaTumor Burden