This image displays pigmented skin that happens to be an abnormal mole, but a lesion that has this variation in color should be biopsied to verify it's not melanoma. This image displays a black and red atypical nevus. This image displays an atypical nevus (mole) that is larger than a pencil eraser in diameter, has an irregular border, and has a slightly lighter pink-brown color on the right side, in addition to peeling skin from a sunburn. This image displays an atypical nevus (mole) with deep and multiple colors and an irregular border. As displayed in this image, atypical nevi (moles) usually have variation in color. This image displays an atypical nevus (mole).
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Mole, Atypical (Atypical Nevus):
Information for adults

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Picture of Mole, Atypical (Atypical Nevus): This image displays pigmented skin that happens to be an abnormal mole, but a lesion that has this variation in color should be biopsied to verify it's not melanoma. Divider line
This image displays pigmented skin that happens to be an abnormal mole, but a lesion that has this variation in color should be biopsied to verify it's not melanoma.
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Self-Care Guidelines
  • Protective measures, such as avoiding skin exposure to sunlight during peak sun hours (10 AM to 3 PM), wearing protective clothing, and applying high-SPF sunscreen, are essential for reducing exposure to harmful ultraviolet (UV) light.
  • Monthly self-examination of the skin is helpful to detect new lesions or changes in existing lesions.
  • Be sure your atypical moles are not signs of skin cancer (melanoma). Remember the ABCDEs of melanoma lesions:
    A - Asymmetry: One half of the lesion does not mirror the other half.
    B - Border: The borders are irregular or vague (indistinct).
    C - Color: More than one color may be noted within the mole.
    D - Diameter: Size greater than 6 mm (roughly the size of a pencil eraser) may be concerning.
    E - Evolving: Notable changes in the lesion over time are suspicious signs for skin cancer.
When to Seek Medical Care
  • The occurrence of a new mole (pigmented nevus) in an adult is unusual; if a new pigmented lesion occurs, see your doctor for evaluation.
  • People with multiple moles and unusual (atypical) moles should be examined by a dermatologist every 4–12 months depending on their past history and family history.
  • It may be difficult to tell an atypical mole from a normal mole, so seek medical evaluation if you are unsure about the nature of a mole or if you note changes within a mole.
  • Your doctor may recommend that you have a biopsy or surgical removal (excision) of unusual-appearing moles to find out whether or not you have atypical moles or melanoma.
Last Modified: 15 Feb 2008

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