Pituitary adenoma Pituitary prolactin cell adenoma SNOMEDCT_US:134209002 Prolactinoma UMLS:C0033375 HP:0006767 A type of pituitary adenoma originating in prolactin secreting cells. This kind of adenoma is characterized by overproduction of prolactin, and may cause loss of menstrual periods and breast milk production in women. Prolactin-secreting pituitary adenoma HP:0040278 SNOMEDCT_US:34337008 Pituitary prolactinoma