NeurofibromaNeurofibromatosis 1Neurofibroma, PlexiformGenes, Neurofibromatosis 1Neurofibromin 1NeurofibromatosesNerve Sheath NeoplasmsCafe-au-Lait SpotsPeripheral Nervous System NeoplasmsNeurilemmomaNeurofibrosarcomaSchwann CellsSubcutaneous TissueNervous System NeoplasmsNeurofibromatosis 2S100 ProteinsPeripheral NervesSkin NeoplasmsReceptors, SomatotropinChromosomes, Human, Pair 17Mast CellsImmunohistochemistryLoss of HeterozygositySoft Tissue NeoplasmsMutationCell Transformation, NeoplasticMagnetic Resonance ImagingTumor Markers, BiologicalSequence DeletionGrowth DisordersPhenotypeAllelesHeterozygotePedigreePolymerase Chain ReactionMice, TransgenicDNA Mutational AnalysisTomography, X-Ray Computed