Asymmetry – Melanoma is often asymmetrical, which means the shape isn’t uniform. Non-cancerous moles are typically uniform and symmetrical in shape.
Border – Melanoma often has borders that aren’t well defined or are irregular in shape, whereas non-cancerous moles usually have smooth, well-defined borders.
Color – Melanoma lesions are often more than one color or shade. Moles that are benign are typically one color.
Diameter – Melanoma growths are normally larger than 6mm in diameter, which is about the diameter of a standard pencil.
Evolution – Melanoma will often change characteristics, such as size, shape or color. Unlike most benign moles, melanoma tends to change over time. If a mole or skin growth has any of the ABCDEs of melanoma, the patient should be refferred urgently to a dermatologist.