Warning Signs: The ABCDEs of Melanoma Warning Signs: The ABCDEs of Melanoma A – Asymmetry A – Asymmetry If you can draw a line through the middle and the two sides match, the mole is benign. If you draw a line through the mole and the two halves do not match, this is a warning sign for melanoma. If you can draw a line through the middle and the two sides match, the mole is benign. If you draw a line through the mole and the two halves do not match, this is a warning sign for melanoma. B—Border B—Border A benign mole has smooth, even borders, unlike melanomas. The borders of an early melanoma tend to be uneven. The edges may be scalloped or notched. A benign mole has smooth, even borders, unlike melanomas. The borders of an early melanoma tend to be uneven. The edges may be scalloped or notched. C—Color C—Color Most benign moles are all one color—often a single shade of brown. Having a variety of colors (brown, tan, black, red, white, or blue) is another warning signal. Most benign moles are all one color—often a single shade of brown. Having a variety of colors (brown, tan, black, red, white, or blue) is another warning signal. D—Diameter D—Diameter Benign moles usually have smaller diameter than malignant ones. Melanomas usually are larger in diameter than the eraser on your pencil tip (1/4 inch or 6mm). Benign moles usually have smaller diameter than malignant ones. Melanomas usually are larger in diameter than the eraser on your pencil tip (1/4 inch or 6mm). E—Evolving E—Evolving Common, benign moles look the same over time. Be on the alert when a mole starts to evolve or change in anyway—if this occurs, see a doctor. Common, benign moles look the same over time. Be on the alert when a mole starts to evolve or change in anyway—if this occurs, see a doctor. Http://www.skincancer.org/skincancerinformation/melanoma/melanomawarning-signs-and-images/doyou-know-your-abcdes Http://www.skincancer.org/skincancerinformation/melanoma/melanomawarning-signs-and-images/doyou-know-your-abcdes