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ABCDE Screening Guidelines

A simple and easy way to check your skin for suspicious growths is the ABCDE guideline. Here’s how it works:

  • A is for asymmetry: Be on the lookout for moles where the shape of one half does not match the other half.
  • B is for border: Here, the edges of a mole can be blurred, irregular, notched or ragged in outline and the color or pigment may have spread to the adjoining skin.
  • C is for color: White, grey, red, pink or blue areas may exist. Shades of black, brown and tan may be present. The color may be uneven.
  • D is for diameter: A change in the size of a mole may occur. Usually it increases and is larger than a pencil eraser — about 1/4 inch or six millimeters.
  • E is for evolving: Watch for any change in the shape, size, color, height, or any other trait of a mole, or new symptoms, such as bleeding, crusting or itching.

Regularly checking your skin is key to early detection of skin cancer. Keep in mind that new growths, changes in old growths and other symptoms may be warning signs and need further evaluation by your healthcare provider. Your provider can examine the skin changes to determine if treatment is needed.

Comparison of normal and abnormal skin growths.