ABCDs of Skin Cancer
The column on the left, beginning at the top, demonstrates the ABCDs of skin cancer. A is for asymmetry, meaning both halves of the mole are not the same. B is for borders that are irregular in shape, notched or ragged in appearance. C is for color -- different shades of tan, brown or black within the same mole. D is for diameter that has changed or is over 6 millimeters long.