Congenital Dermal Melanocytosis

**Semantic type:** Congenital Abnormality|Disease or Syndrome

**Definition:** A congenital mark on the skin near the base of the spine, consisting of scattered ectopic melanocytes in the dermis, that enlarges for a short time after birth and disappears during childhood.

**Synonyms:** - Blue Sacral Spot - CDM - Dermal Melanocytosis - Mongolian Macula - Mongolian Spot