Removal of the pituitary gland. Hypothalamus - The part of the brain that lies below the thalamus and functions to regulate autonomic activities, like body temperature and weight. It connects the pituitary to the brain and is the link between the endocrine system and the nervous system.
Hypophysectomy is the surgical removal of the pituitary gland, also called hypophysis. It is most commonly performed to treat tumors, especially craniopharyngioma tumors. Sometimes it is used to treat Cushing's syndrome due to pituitary adenoma.