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Types of Pigmented Birthmarks
- Cafe-au-lait spots are light tan or light brown spots that are usually oval in shape. They usually appear at birth but may develop in the first few years of a child's life. Cafe-au-lait spots may be a normal type of birthmark, but the presence of several cafe-au-lait spots larger than a quarter may occur in neurofibromatosis (a genetic disorder that causes abnormal cell growth of nerve tissues).
- Congenital nevi are moles that are present at birth. These birthmarks have a slightly increased risk of becoming skin cancer depending on their size. Larger (covers an area larger than the size of a fist) congenital nevi have a greater risk of developing skin cancer than do smaller congenital nevi. All congenital nevi should be examined by a health care provider and any change in the birthmark should be reported.
- Pigmented nevi (moles) are growths on the skin that usually are flesh-colored, brown or black. Moles can appear anywhere on the skin, alone or in groups. Moles occur when cells in the skin grow in a cluster instead of being spread throughout the skin. Moles may darken after exposure to the sun, during the teen years and during pregnancy.
Pigmented birthmarks are usually left alone, with the exception of moles and, occasionally, café-au-lait spots. Moles, particularly large or giant congenital nevi, often are surgically removed, though larger ones may be more difficult to remove. Café-au-lait spots can be removed with lasers (highly concentrated light energy) but often return. If a mole exhibits potentially cancerous changes, a biopsy may be performed. Large or prominent moles that affect appearance and self-esteem may be covered with special cosmetics.