Nerve Sheath NeoplasmsPeripheral Nervous System NeoplasmsNeurofibromaNeurofibromatosis 1NeurilemmomaNeurofibroma, PlexiformGenes, Neurofibromatosis 1Neurofibromin 1Sarcoma, SynovialS100 ProteinsPeripheral NervesNeurofibromatosesSchwann CellsSoft Tissue NeoplasmsThoracic NeoplasmsSarcomaEpithelioid CellsImmunohistochemistryPeripheral Nerve InjuriesHMGA ProteinsHemangiopericytomaScalpSciatic NerveNervous System NeoplasmsHorse DiseasesTumor Markers, BiologicalDog Diseases