Neurofibromatoses

**Definition:** The neurofibromatoses (NF) are related genetic disorders which affect bone, soft tissue, skin and nervous system. In NF type 1 neurofibromas develop in the skin and elsewhere: these can cause problems as a result of their visibility in the skin, compression of vital internal structures or from malignant degeneration. Neuromas of the acoustic nerve are the predominant problem in NF type 2.