Mole (nevi)

About Mole (nevi)

Moles contain skin pigment cells and they can appear anywhere on the body and have a range of colors. Most are dark brown. The majority of moles are not dangerous, but some can turn into the skin cancer called malignant melanoma. The ABCDE rule can help one know the difference between a mole and melanoma. A: Asymmetry-moles are symmetric in shape, melanomas are asymmetric meaning they look different on one side compared to the other. B: Border-moles have regular borders, melanomas have irregular, rugged or notched borders. C: Color-moles have the same color throughout while melanomas tend to have varied colors within the same growth. D: Diameter-moles tend to be less than 1/4 inch (6mm) whereas melanomas often are larger. E: Evolution-moles do not change size, shape or color, whereas changing size, shape or color increases the chance that the skin lesion is melanoma. The medical term for a mole is nevus.

Symptoms

Moles can appear anywhere on the body. They are brown to reddish brown in color and are usually less than 1/4 inch (6 mm). They are symmetrical in shape, have a consistent color throughout, have smooth regular borders, and do not change shape, color or size. Any new mole or mole that does not meet these criteria should be evaluated by a health care provider.

Tests & Diagnostics

A history and physical exam will be done. Moles with the ABCDE (see Description) traits of a melanoma should be biopsied to rule out the skin cancer called malignant melanoma.

Common tests: Skin biopsy.

Conventional treatment summary

Any suspicious moles will be biopsied to rule out cancer (melanoma). Most moles do not need treatment but should be followed periodically by a healthcare provider. Some patients choose to have moles removed for cosmetic reasons.

Medical specialties

Internal Medicine · Dermatology · Pediatrics · Family Practice · Pediatric Dermatology · Mohs Surgery

This page is educational content, not medical advice. Always consult a qualified clinician for diagnosis and treatment of Mole (nevi).