[A rare case of giant galactocele associated with prolactinoma].

Galactocele is a rare cystic formation, a benign breast lesion, occurring when breast duct is blocked and engorged. It generally affects postpartum women, either breastfeeding or not. Only a few cases have been reported in the literature and they were not related to lactation, as in the case of postmenopausal women or of men; moreover, their relationship to the overproduction of prolactin, a growth factor stimulating mammary epithelial cells, is not very well defined at this time. We here report the unusual case of a 30-year old patient with no personal history of childbirth or abortion. She was treated in the Division of Endocrinology for pituitary microadenoma with Cabergoline, that she stopped for 1 year. Even taking into account this rare association, it is important to emphasize the role of hormones in the progression of breast anatomy.