A - Asymmetrical Shape   

Melanoma lesions are typically irregular, or not symmetrical, in shape. Benign moles are usually symmetrical.

B - Border      

Typically, non-cancerous moles have smooth, even borders. Melanoma lesions usually have irregular borders that are difficult to define.

C - Color    

The presence of more than one color (blue, black, brown, tan, etc.) or the uneven distribution of color can sometimes be a warning sign of melanoma. Benign moles are usually a single shade of brown or tan.

D - Diameter    

Melanoma lesions are often greater than 6 millimeters in diameter (approximately the size of a pencil eraser).

E - Evolution

The evolution of your mole(s) has become the most important factor to consider when it comes to diagnosing a melanoma. Knowing what is normal for YOU could save your life. If a mole has gone through recent changes in color and/or size, bring it to the attention of a dermatologist immediately.

photos courtesy of the National Cancer Institute/Skin Cancer Foundation.