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Mongolian spot is a congenital developmental condition exclusively involving the skin. It results from the entrapment of melanocytes in the dermis during their movement from the neural crest into the epidermis. The condition is not linked to sex, and both male and female infants are equally predisposed to Mongolian Spot. It does not carry with it any health risks.
Mongolian Spot is most common among members of the Mongoloid race ( Chinese, Japanese, Indonesian s, Amerindians, etc.), occurring in approximately 80-90% of East Asian infants, 80% of East African infants, 40-50% of Hispanic infants, and 1-10% of Caucasian infants.