MARK2 and pituitary gland adenoma: Regarding kinase activity, MAST4, TNN, PLXND1, and COL22A1 are directly involved in the serine/threonine kinase family and PI3K-Akt and Akt signaling pathways, which can induce tumor formation in GH-secreting pituitary adenoma (www.genecards.org)23–25.