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Melanoma/Skin Cancer Health Center

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Melanoma/Skin Cancer Health Center

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Diameter

The most important warning sign for melanoma is a change in size, shape, or color of a mole or other skin growth, such as a birthmark. One of the things to watch for is diameter.

Diameter is width. If the diameter across a mole or skin growth is larger than 1/4 inch (6 mm), or about the size of a pencil eraser, talk to your doctor. Also, call your doctor if any mole seems to be growing, even if it is still smaller than 1/4 inch (6 mm).

By	Healthwise Staff
Primary Medical Reviewer	Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer	Alexander H. Murray, MD, FRCPC - Dermatology
Last Revised	December 17, 2010

WebMD Medical Reference from Healthwise

Last Updated: December 17, 2010

This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.