Type B meningiomas feature NF2 mutations and 22q loss, and have a recurrence rate similar to that of type A. Finally, type C meningiomas have NF2 mutations associated with high genomic instability, consisting of frequent chromosomal losses (among which 22q and 1p losses are the most frequent), and feature the worst prognosis [38]. Here, NF2 is linked to meningioma.