A congenital abnormality of the pituitary that is responsible for pituitary deficiency with usual manifestation of a triad of very thin or interrupted pituitary stalk, an ectopic (or absent) posterior pituitary and hypoplasia or aplasia of the anterior pituitary. In the majority of cases no genetic cause is found, however, the presence of familial forms and the association with microphallus and congenital abnormalities, particularly of the eyes, suggest an antenatal origin. [from
SNOMEDCT_US]