NeurilemmomaNeurofibromatosis 2Neuroma, AcousticCranial Nerve NeoplasmsPeripheral Nervous System NeoplasmsGenes, Neurofibromatosis 2Neurofibromin 2NeurofibromatosesNeurofibromaVestibulocochlear Nerve DiseasesMeningiomaFacial Nerve DiseasesEar NeoplasmsNervous System NeoplasmsTrigeminal Nerve DiseasesVestibular NerveSpinal Cord NeoplasmsFacial NerveGlossopharyngeal Nerve DiseasesLabyrinth DiseasesVestibulocochlear NerveSchwann CellsNerve Sheath NeoplasmsVagus Nerve DiseasesPeripheral NervesCerebellopontine AngleMeningeal NeoplasmsMagnetic Resonance ImagingGanglia, SensoryRetroperitoneal NeoplasmsGlomus Jugulare TumorNeurosurgical ProceduresOrbital NeoplasmsMedian NeuropathyEthylnitrosoureaS100 ProteinsOtologic Surgical ProceduresSpinal CanalHemosiderinPeripheral Nervous SystemPeripheral Nervous System DiseasesCyclic AMP-Dependent Protein Kinase RIalpha SubunitSpinal NeoplasmsChromosomes, Human, Pair 22ImmunohistochemistryPenile NeoplasmsPeripheral Vascular DiseasesRadiosurgeryRetrospective StudiesTemporal BoneTomography, X-Ray ComputedNeoplasms, Muscle TissueLeiomyomaNeurofibromatosis 1Ear, InnerSpinal Nerve RootsLeukocytes, MononuclearGastrointestinal NeoplasmsGastrointestinal Stromal TumorsPeripheral Nerve InjuriesBrain NeoplasmsPeripheral Arterial DiseaseHemangioma, CavernousLoss of HeterozygosityGadolinium DTPASkin NeoplasmsTreatment OutcomeEndoscopySoft Tissue NeoplasmsLymphoma, T-Cell, PeripheralPolymerase Chain ReactionAstrocytomaLymphocytesp21-Activated KinasesHead and Neck NeoplasmsFollow-Up StudiesContrast MediaT-LymphocytesSciatic NerveImage EnhancementCells, CulturedLymphocyte ActivationGenetic MarkersFlow CytometryGlial Fibrillary Acidic ProteinDNA Mutational AnalysisCell ProliferationPostoperative Complications