Congenital Nevus Birthmark
Skin Conditions
Congenital Nevus Birthmark
FACTS:
- Congenital nevi are common birthmarks.
- The size of the nevus may vary from a small one-inch mark to a giant birthmark covering half of the body or more.
- Nevi vary greatly in size, shape, texture, and hairiness. The color can vary from light brown to nearly black. Some have fine downy hair; many have long, thick, darker, coarser or curlier hair.
- A child may have one giant nevus and many small nevi or only small-scattered nevi.
- There is no known cause, and therefore no way to prevent these birthmarks.
TREATMENT:
- There is risk of skin cancer developing in the mole. The risk is higher during the time when the body is maturing.
- It is important to look closely at congenital moles on a regular basis. Photographs of the nevus at regular intervals can help the caregiver note changes.
- Signs of early change to skin cancer include the development of irregular borders, changes in color and a change in the surface of the mole. When changes are noted consult with a doctor is important.
- Treatment of nevi depends on size, location, estimated risk for skin cancer, and expected benefit in appearance.
Giant Congenital Nevi
- Babies with giant congenital moles have an increased risk of developing (skin cancers).
- Many of these skin cancers will occur during the first ten years of life.
- It is important for a child to be evaluated by a doctor if a giant congenital nevi is present





