Those are five characteristics that make a mole
more likely to be a melanoma, one of the most aggressive of skin
cancers. A= Assymetry: if one half of a mole appears different than the other half. B=Border: if the borders are notched and irregular. C= Color: if the mole exhibits more than one color, usually dark brown, black, or purple. D= Diameter: if the mole is more than 6 mm in diameter. E = Elevation: if the mole is greatly elevated.