Additional genes—PHYHD1, LTBR, MYBPHL, C22orf42, PRR5, ANKDD1A, RAB13, CAMKV, KIFC3, WNT4, and STAT6—were implicated in the invasive behavior of non-functioning pituitary adenomas (NFPAs) [21]. This evidence concerns the gene WNT4 and pituitary gland adenoma.