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Neurofibromatosis
Neurofibromatosis is a genetic disorder caused by a mutation to the NF1 or NF2 gene. Neurofibromatosis 1 (NF1) is characterized by multiple benign tumors and patches of skin pigmentation called café au lait spots. Neurofibromatosis 2 (NF2) is characterized by tumors of the hearing and balance nerve.