Quantcast This image displays a close-up of the neck showing the typical velvety skin thickening seen in acanthosis nigricans. Acanthosis nigricans, most commonly, is noticed at the armpits and/or neck as a slightly thickened color change, which is sometimes described as appearing "velvety." The darkened color and skin thickening is sometimes subtle in mild and early cases of acanthosis nigricans, as seen here. In addition to the subtle darkening and thickening of the armpit skin caused by acanthosis nigricans, striae (stretch marks) can be seen. In this image of acanthosis nigricans, the patient has very pronounced skin thickening such that the folds appear to have deep cracks and a noticeable texture in comparison to the surrounding skin. This image displays acanthosis nigricans, which affects the body folds, most frequently the neck and armpits. This image displays a skin fold with a rough, "velvety" appearance typical of acanthosis nigricans. The neck displays the skin thickening and dark color of acanthosis nigricans. The thickening on the skin of the neck from acanthosis nigricans often has a "furrowed" appearance.
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Acanthosis Nigricans:
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Picture of Acanthosis Nigricans: This image displays a close-up of the neck showing the typical velvety skin thickening seen in acanthosis nigricans. Divider line
This image displays a close-up of the neck showing the typical velvety skin thickening seen in acanthosis nigricans.
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Overview
Acanthosis nigricans is a condition characterized by abnormal thickening and darkening of the skin, especially in body creases. It is most commonly associated with obesity or polycystic ovarian disease in women, though acanthosis nigricans can occasionally be found in people who have more serious underlying health problems or who are taking certain medications. Treatment of the underlying medical condition usually resolves the skin lesions.
Last Modified: 22 Dec 2008

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