Congenital Dermal Melanocytosis

Congenital dermal melanocytosis is a bluish or grayish pigmentation of the skin present from birth, originating from pigment-producing cells located in deep layers of the skin. The best-known variant usually appears on the lower back and buttocks of babies.

Typical appearance: It is seen as one or several flat spots of a slate blue or gray tone, without any raised area or scaling, that cause no discomfort.

Course: Many of these spots tend to fade naturally during the first years of life, although some may persist.

Which specialist treats it? The pediatrician usually identifies it during the baby's checkups, and the dermatologist can evaluate the pigmentation when it is extensive, atypical or raises doubts. Faced with any spot that changes in appearance, the recommended thing is to discuss it with a professional for a calm evaluation.