Neurofibroma, PlexiformNeurofibromatosis 1NeurofibromaGenes, Neurofibromatosis 1Neurofibromin 1Nerve Sheath NeoplasmsNeurofibromatosis 2Peripheral Nervous System NeoplasmsNeurofibromatosesGenes, Neurofibromatosis 2Cafe-au-Lait SpotsNeurofibromin 2NeurilemmomaOptic Nerve GliomaNeurofibrosarcomaSchwann CellsNeuroma, AcousticOptic Nerve NeoplasmsNervous System NeoplasmsChromosomes, Human, Pair 17Cranial Nerve NeoplasmsAuditory Brain Stem ImplantsMeningiomaHamartomaMutationSkin NeoplasmsMagnetic Resonance ImagingMeningoceleS100 ProteinsTumor Markers, BiologicalLearning DisordersBone Diseases, DevelopmentalLoss of Heterozygosity