Melanomas may form from an existing mole or freckle, or begin to grow from a normal-appearing area of the skin. Any change in a mole's appearance or the growth of a new mole may be a sign of skin cancer. Suspicious moles or freckles should be checked by a doctor.
Melanomas vs. normal moles:
- Moles and freckles usually are brown or black and have a defined edge or border.
- Melanomas usually are multi-colored. They may combine different shades of brown and black, sometimes with areas of red, blue, or white. They often have an irregular or uneven border.
- Be alert for moles or freckles that ooze fluid or blood, crust or clot over, and then ooze or bleed again and don't heal-they could be a sign of cancer.
- Asymmetry, when one half of the growth has a different shape than the other.
- Border irregular, when the growth has scalloped or uneven edges.
- Color varied, when the growth is more than one color. Melanomas may be black, shades of brown and tan, and even have specks of red, white, and blue.
- Diameter, when the size, measured edge to edge, is bigger than the diameter of a pencil eraser.
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