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Patent Granted Neurofibromatosis type I (NF-1) is a tumor disorder that is caused by the mutation of a gene on chromosome 17 that is responsible for control of cell division. NF-1 causes tumors along the nervous system. Common symptoms of NF-1 include scoliosis (curvature of the spine), learning disabilities, vision disorders, and epilepsy. NF-1 was formerly known as von Recklinghausen disease after the researcher (Friedrich Daniel von Recklinghausen) who first documented the disorder. Neurofibromatosis type 1 is one of the most common single-gene disorders affecting neurological function in humans.