Neuroectodermal Tumors, PrimitiveNeuroectodermal TumorsNeuroectodermal Tumors, Primitive, PeripheralSarcoma, EwingMedulloblastomaCerebellar NeoplasmsSupratentorial NeoplasmsNeuroectodermal Tumor, MelanoticBrain NeoplasmsRNA-Binding Protein EWSProto-Oncogene Protein c-fli-1PinealomaEpendymomaSpinal Cord NeoplasmsChromosomes, Human, Pair 22Sarcoma, Small CellRhabdoid TumorBone NeoplasmsCentral Nervous System NeoplasmsThoracic NeoplasmsOrbital NeoplasmsIfosfamideOncogene Proteins, FusionParaparesisNeuroblastomaFatal OutcomeThoracic WallVincristineNeoplasms, Germ Cell and EmbryonalAstrocytomaImmunohistochemistryTomography, X-Ray ComputedChromosomes, Human, Pair 11Abdominal NeoplasmsTumor Markers, BiologicalChromosomes, Human, Pair 17Translocation, GeneticEtoposideTeratomaPineal GlandCranial IrradiationNeurofilament ProteinsLomustineMagnetic Resonance ImagingCombined Modality TherapyCyclophosphamideThiotepaRhabdomyosarcomaSoft Tissue NeoplasmsIn Situ Hybridization, FluorescenceTumor Cells, CulturedAntineoplastic Combined Chemotherapy ProtocolsGene RearrangementDNA, NeoplasmTreatment OutcomeGliomaGene AmplificationMaxillary NeoplasmsPolymerase Chain Reaction