By letting people know that people have tumors and are getting cancer,could go blind or hearing impaired Neurofibromatosis is a genetic disorder that causes tumors to form on nerve tissue. These tumors can develop anywhere in your nervous system, including your brain, spinal cord and nerves. Neurofibromatosis is usually diagnosed in childhood or early adulthood.May is Neurofibromatosis Awareness Month for 1 in 3,000 People Worldwide. ... NF causes tumors to grow on nerves throughout the body. As part of the campaign, the Foundation's I Know a Fighter initiative is a reflection of the bravery that NF patients exhibit in their daily lives.