Hyperfunction of pituitary gland

**Definition:** A disease characterised by hypersecretion of adenohypophyseal hormones such as growth hormone, prolactin, thyrotropin, luteinising hormone, follicle stimulating hormone or adrenocorticotropic hormone.

Clinical status with excessive production of one or more pituitary hormones, which is mostly caused by hormone-producing pituitary adenomas.

**Exclusions:** - Multiple endocrine neoplasia type 1 - Multiple endocrine neoplasia type 4 - Cushing syndrome - Nelson syndrome - overproduction of pituitary ACTH - overproduction of thyroid-stimulating hormone