Neurofibromatosis (NF) is a genetic disorder that causes tumors to form on nerve tissues. There are two main types, NF1 and NF2. Symptoms can include café au lait spots, learning disabilities, bone deformities, pain, numbness, and trouble sleeping. NF is caused by mutations on chromosomes 17 and 22 that result in uncontrolled cell growth. It is usually diagnosed during a physical exam and may require eye, ear, imaging and genetic testing. Treatments include surgery, medication to manage symptoms, and lifelong monitoring due to risks of neurological problems, cancer and other complications. Support groups like the Children's Tumor Foundation provide resources for patients and their families.