2) Main article: Neurofibromatosis type II Neurofibromatosis type 2 (also called "central neurofibromatosis" [ 1 ] ) is the result of mutation of the protein merlin (also known as "Neurofibromin 2" or "schwannomin" [ 1 ] ) in chromosome 22q 12. It accounts for only 10% of all cases of NF,