Most pituitary tumors are adenomas that develop in the adenohypophysis (the anterior lobe of the pituitary gland), which is composed of six epithelial cell types that secrete peptide hormones.

1 Department of Psychiatry, Spencer Fox Eccles School of Medicine, University of Utah, Salt Lake City, UT, United States 2 Department of Psychiatry, NYU Grossman School of Medicine, New York, NY, ...