Neurofibromatosis it a disease that effects the brain, spinal cord, nerves, and skin. Tumors grow under the skin or on the body’s nerves. NF is inherited from parent or from product gene mutations. The symptoms start with light brown spots on the skin another thing to look for would be bumps under skin. Also tiny tan clumps of pigment on the iris of eye. Any enlargement or malformation of bones. Scoliosis is one malformation that can happen.
The doctor would examine skin for bumps. Another way to know for sure would be to have genetic testing. One test that is 85 percent accurate is a linkage analysis. That would require blood tests from multiple family members. There is no cure but it can be treated with surgery to remove