Nerve Sheath NeoplasmsPeripheral Nervous System NeoplasmsNeurofibromatosis 1NeurofibromaNeurofibroma, PlexiformNeurilemmomaGenes, Neurofibromatosis 1Sarcoma, SynovialNeurofibromin 1Soft Tissue NeoplasmsS100 ProteinsNeurofibromatosesSchwann CellsThoracic NeoplasmsSarcomaHMGA ProteinsEpithelioid CellsScalpImmunohistochemistryPeripheral NervesTumor Markers, BiologicalThighFatal OutcomeCell Line, TumorMagnetic Resonance ImagingReverse Transcriptase Polymerase Chain ReactionTissue Array AnalysisCell ProliferationIn Situ Hybridization, FluorescenceGene Expression Regulation, NeoplasticTomography, X-Ray ComputedCell Transformation, NeoplasticPeripheral Nerve InjuriesHemangiopericytomaLiposarcomaTranslocation, GeneticGene Expression ProfilingOncogene Proteins, FusionImmunoenzyme TechniquesSciatic NerveNervous System NeoplasmsSignal TransductionAntineoplastic AgentsXenograft Model Antitumor AssaysHorse DiseasesPrognosisOligonucleotide Array Sequence AnalysisDog DiseasesReceptor, Epidermal Growth FactorMutationNeurothekeoma