Mondo Description A congenital vascular malformation in the skin (birthmark) characterized by the presence of dilated capillaries. The affected area of the skin is flat and reddish-purplish in color.

Uniprot Description A form of vascular malformations that are present from birth, tend to grow with the individual, do not regress spontaneously, and show normal rates of endothelial cell turnover. Capillary malformations are distinct from capillary hemangiomas, which are highly proliferative lesions that appear shortly after birth and show rapid growth, slow involution, and endothelial hypercellularity.