hyperpituitarism /-pityo̅o̅″itəriz′əm/ [Gk, hyper, excess; L, pituita, phlegm] , overactivity of the anterior lobe of the pituitary gland, resulting in increased secretion of its hormones leading to such conditions as acromegaly and Cushing’s disease. See also gigantism, acromegaly, Cushing’s disease.
