NCCN Guidelines for Patients® | Melanoma - page 12

12
NCCN Guidelines for Patients
®
: Melanoma
Version 1.2013
Part 1: About melanoma
ABCDE rule
Asymmetry:
One half or side of the mole does not match the other half or side.
Border irregularity:
The edges of the mole are ragged or notched.
Color:
The color of the mole is not the same throughout. There may be different shades of tan, brown, or black and
sometimes patches of red, blue, or white.
Diameter:
The mole is wider than ¼ inch—the top of a pencil eraser. However, doctors have found melanomas as
small as ⅛ inch.
Evolving:
The mole has changed in size, shape, color, or texture over the past few weeks or months.
Figure 6. ABCDE rule: Moles with and
without signs of cancer
Illustration Copyright © 2013 Nucleus Medical Media,
All rights reserved.
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