Dark brown skin patches, raised spots (lisch nodules) on the iris of the eye
, fractures of long bones
in childhood, freckling armpits, neurofibromas (tumors on the skin or deeper in the body), larger tumors under the skin (plexiform neurofibromas), with pressure on nearby nerves or organs, cognitive impairment
, learning disorder. Most people just get mild forms of disease and nothing else.