neurofibromatosis

Light brown or coffee-colored pigmentation marks on the skin, generally harmless and primarily a cosmetic concern.  ....

A neurofibroma is a benign nerve tumor that arises from the supporting cells of nerves. They can occur on their own or be part of the genetic disorder neurofibromatosis type 1 (NF1).  ....

Juvenile xanthogranuloma (JXG) is a rare, benign skin condition that primarily affects children. It is characterized by small, firm, red-yellow bumps on the skin, usually painless and non-itchy. ....