NF2 and meningioma: Several studies have demonstrated the genetic predisposition of patients with neurofibromatosis type 2 (NF2) to develop meningiomas: NF2 in an autosomal dominant disorder caused by alteration of the NF2 gene with loss of function of the tumor suppressor protein,2 and 50%–75% of patients with this gene alteration have developed meningioma.3