Nerve Sheath NeoplasmsPeripheral Nervous System NeoplasmsNeurofibromatosis 1NeurofibromaOptic Nerve NeoplasmsNeurofibroma, PlexiformNeurilemmomaGenes, Neurofibromatosis 1Sarcoma, SynovialNeurofibromin 1Soft Tissue NeoplasmsS100 ProteinsNeurofibromatosesSchwann CellsOptic NerveThoracic NeoplasmsSarcomaHMGA ProteinsEpithelioid CellsCranial Nerve NeoplasmsScalpPeripheral NervesImmunohistochemistryTumor Markers, BiologicalThighFatal OutcomeCell Line, TumorMagnetic Resonance ImagingReverse Transcriptase Polymerase Chain ReactionTissue Array AnalysisCell ProliferationSciatic NervePeripheral Nerve InjuriesTomography, X-Ray ComputedIn Situ Hybridization, FluorescenceGene Expression Regulation, NeoplasticCell Transformation, NeoplasticOptic Nerve InjuriesHemangiopericytomaLiposarcomaTranslocation, GeneticGene Expression ProfilingImmunoenzyme TechniquesOncogene Proteins, FusionNervous System NeoplasmsSignal TransductionAntineoplastic AgentsXenograft Model Antitumor AssaysHorse DiseasesPrognosisDog DiseasesOligonucleotide Array Sequence AnalysisOptic Nerve DiseasesOptic DiskReceptor, Epidermal Growth FactorMutationNeurothekeoma