Mongolian spot /mong·gō″lē·ən/ [Mongol, Asian ethnic group; ME, spotte, stain] , a benign bluish-black macule, between 2 and 8 cm, occurring over the sacrum and on the buttocks of some newborns. It is especially common in African-Americans, Native Americans, southern Europeans, and Asian-Americans and usually disappears during early childhood.
