It could be a sign of an underlying condition, so it needs to be checked by a GP. Lesions are unilateral along lines of Blaschko and may become evident during infancy, childhood, or adulthood. Unilateral acanthosis nigricans (nevoid acanthosis nigricans) It is a rare form of AN, inherited as an autosomal dominant trait. The main symptom of acanthosis nigricans is patches of skin that are darker and thicker than usual.

What causes acanthosis nigricans? Lesions occur over the face, scalp, chest, abdomen, especially periumbilical area, back and thigh.
Acanthosis nigricans is a skin disorder that results in velvety, light-brown-to-black markings that can occur in any location but mainly are found in the skin folds of the neck, armpits, groin, and under the breasts. AN is more common in people who have diabetes. Acanthosis nigricans is a skin disorder characterised by darkening ( hyperpigmentation) and thickening ( hyperkeratosis) of the skin, occurring mainly in the folds of the skin in the armpit ( axilla ), groin and back of the neck. Fertil Steril. ACANTHOSIS NIGRICANS: Author: drpsg, Posted on Sunday, September 12 @ 11:54:36 IST by RxPG Add to My Pages Printer Friendly Email Story Download Story Medicine alerts : D/D OF ACANTHOSIS NIGRICANS ***** 1) ENDOCRINE PROBLEMS-----a) INSULIN RESISTANCE @ 1993;59(3):583–6.

Acanthosis nigricans is the name for dry, dark patches of skin that usually appear in the armpits, neck or groin. These tests can help find out if you have another medical condition. Acanthosis nigricans is not a skin disease per se but a cutaneous sign of an underlying condition or disease. Vulvar acanthosis nigricans: a marker for insulin resistance in hirsute women. If your dermatologist diagnoses you with AN, you may need a blood test and other medical tests. Some people see thicker, darker skin on the palms of their hands, inner thighs, groin, lips, or other areas. Check if you have acanthosis nigricans.

A dermatologist can diagnose acanthosis nigricans (AN) by looking at your skin.

Grasinger CC, Wild RA, Parker IJ. Acanthosis nigricans (ah-kan-THO-sis NY-gruh-kans) causes thicker and darker patches or streaks around joints and body areas with many creases and folds (such as knuckles, armpits, elbows, knees, and the sides and back of the neck).