Melanoma lesions are typically irregular or not symmetrical in shape. Benign lesions are usually symmetrical.
The borders of an early melanoma tend to be uneven or difficult to define. Edges may be scalloped or notched.
The presence of more than one color (black, brown, blue, red, etc.) or the uneven distribution of color can be a warning sign. Benign moles are typically one shade.
Melanoma lesions are often greater than 6 millimeters in diameter, which is greater than the size of a pencil eraser.
Any change in size, shape, color, or elevation is important in diagnosis. New symptoms such as bleeding, itching, or crusting should be brought to the attention of the healthcare provider.
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