Pituitary adenomas, also referred to as pituitary neuroendocrine tumors, are almost always benign tumors that arise from hormone-secreting cells in the pituitary gland. 

This gland is situated at the base of the brain, just behind the bridge of the nose, inside a bony cave called the sella turcica. The pituitary gland is considered the “master” gland because it controls all the other hormone-producing glands in the body. <...