Nerve Sheath NeoplasmsPeripheral Nervous System NeoplasmsNeurofibromatosis 1NeurofibromaNeurofibroma, PlexiformNeurilemmomaGenes, Neurofibromatosis 1Sarcoma, SynovialNeurofibromin 1Soft Tissue NeoplasmsS100 ProteinsPeripheral NervesNeurofibromatosesSchwann CellsThoracic NeoplasmsSarcomaHMGA ProteinsEpithelioid CellsScalpImmunohistochemistryPeripheral Nerve InjuriesTumor Markers, BiologicalThighSciatic NerveFatal OutcomeCell Line, TumorMagnetic Resonance ImagingReverse Transcriptase Polymerase Chain ReactionCell ProliferationTissue Array AnalysisIn Situ Hybridization, FluorescenceTomography, X-Ray ComputedGene Expression Regulation, NeoplasticCell Transformation, NeoplasticHemangiopericytomaLiposarcomaTranslocation, GeneticGene Expression ProfilingOncogene Proteins, FusionImmunoenzyme TechniquesNervous System NeoplasmsSignal TransductionAntineoplastic AgentsXenograft Model Antitumor AssaysHorse DiseasesPrognosisDog DiseasesOligonucleotide Array Sequence AnalysisNerve RegenerationReceptor, Epidermal Growth FactorPeripheral Nervous System DiseasesMutationOptic NerveNeurothekeoma