Hyperfunction Disorders
Vast majority due to benign tumors that no longer respond to negative feedback control and are autonomous (e.g. glucose _, normally _ release of GH from the anterior pituitary, but in acromegaly, which is due to oversecretion of GH by a benign pituitary a
Exception to the rule of nonsuppressibility: prolactinomas and pituitary adenomas that secrete ACTH (pit. Cushing) - both only partially autonomous.