The ABCD's of Melanoma

Asymmetry - One half does not match the other half

Border irregularity - The edges are ragged, notched or blurred.

Color - The pigmentation is not uniform.  Shades of tan, brown and black are present.  Dashes of red, white and blue add to the mottled appearance.

Diameter - greater than six millimeters (about the size of a pencil eraser).  Any growth of a mole should be of concern.