- Flat, light brown spots on the skin-If you have more than six of them, it's a strong indication of NF1.
- Freckling in the armpits or groin area-Freckling usually appears by age 4 or 5
- Bone deformities-Abnormalities in the way bones grow and a deficiency in bone mineral density can cause bone deformities such as a curved spine (scoliosis) or bowed lower leg.
·NF has been classified into three distinct types; NF1, NF2 and schwannomatosis. They are caused by different genes, located on different chromosomes.
·NF1 is the most common neurological disorder caused by a single gene; occurring in one in every 3,000 children born.
·NF2 is a rarer type, occurring in 1:25,000 people worldwide.