Neurofibromatosis (NF) is a genetic disorder that affects the nervous system. People affected by this condition develop non-cancerous tumours along their nerves. The tumours are called neurofibromas. They are a mass of different types of cells that grow on and surround nerves.
NF can also cause skin discolorations (also called "café au lait" spots) and bone abnormalities. Men, women, and people of all ethnic backgrounds may develop the condition.