NF2 is a ‘tumour protection’ gene that helps to protect against benign tumours.
Everyone has two NF2 genes in every cell of their body (one from their mother, and one from their father). If one of the genes is not working, this is known as having a faulty NF2 gene, or having a NF2 mutation. People with a faulty NF2 gene are known to have Neurofibromatosis type 2.
Sometimes, the faulty NF2 gene is only in some of the cells of the body. This is known as being mosaic. People with mosaic NF2 may have milder features.