- A persistent visible mark on the skin that is evident at birth or shortly thereafter. A birthmark is often due to a nevus (a mole) or an hemangioma (a localized collection of small blood vessels). Birthmarks that are pink or red are commonly capillary hemangiomas — collections of tiny blood vessels — that are most evident when the baby cries. Common locations are on the midforehead, the eyelids, just above the nose, between the nose and the upper lip, and the so-called "stork bite" on the nape of the neck. These marks generally become harder to see or disappear entirely within a few years.
* * *A persistent visible lesion, usually on the skin, identified at or near birth; commonly a nevus or hemangioma. See nevus (1).- strawberry b. SYN: strawberry nevus.
* * *birthmark vt
* * *n.a skin blemish or mark present at birth. The cause is unknown but most birthmarks grow before the baby is born. See naevus.
* * *birth·mark (burthґmahrk) any congenital blemish or spot on the skin, usually visible at birth or shortly after, such as a nevus or mole.
Medical dictionary. 2011.