ABSTRACT
Galactorrhoea is defined as milky discharge from the breast not related to pregnancy and usually 1 year after pregnancy and cessation of breastfeeding. Galactorrhoea is typically bilateral and multiductal, though can be unilateral and spontaneous in nature. 1,2 It can also be yellow, green, or brown. It is important to distinguish galactorrhoea from bloody or serosanguinous nipple discharge, which may point toward more a sinister underlying cause such as breast cancer. Galactorrhoea is commonly caused by hyperprolactinaemia when accompanied by amenorrhoea. Hyperprolactinaemia is a condition caused by elevated serum prolactin levels which could be physiological, pathological, or idiopathic in origin. The incidence of galactorrhoea is variable, and it can occur up to 90 percent of women with hyperprolactinaemia. 3 In women who have regular ovulatory cycles with galactorrhoea, the prolactin level is usually normal but it can also have been raised by macroprolactinaemia, which is the inactive form of prolactin.
