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  2. Acanthosis nigricans - Wikipedia

    en.wikipedia.org/wiki/Acanthosis_nigricans

    Acanthosis nigricans is a medical sign characterised by brown-to-black, poorly defined, velvety hyperpigmentation of the skin. [1] It is usually found in body folds, [ 2 ] such as the posterior and lateral folds of the neck , the armpits , groin , navel , forehead and other areas.

  3. Insulin Resistance: From Symptoms to Treatment - AOL

    www.aol.com/insulin-resistance-symptoms...

    But some people develop prediabetes symptoms such as: Acanthosis nigricans. These are characterized by dark patches within skin folds in locations like the neck, armpits, or groin. Skin tags.

  4. Crouzonodermoskeletal syndrome - Wikipedia

    en.wikipedia.org/wiki/Crouzonodermoskeletal_syndrome

    Crouzonodermoskeletal syndrome is a disorder characterized by the premature joining of certain bones of the skull (craniosynostosis) during development and a skin condition called acanthosis nigricans. [1] Some of the signs and symptoms of Crouzonodermoskeletal syndrome are similar to those seen with Crouzon syndrome.

  5. Severe achondroplasia with developmental delay and acanthosis ...

    en.wikipedia.org/wiki/Severe_Achondroplasia_with...

    Acanthosis nigricans is a skin condition in which areas of the skin is of a dark and velvety discoloration, often seen in the body folds and creases such as the armpits, groin, and neck. [6] Within those affected by SADDAN, acanthosis nigricans develops early on, usually in infancy or early childhood. [4]

  6. Rabson–Mendenhall syndrome - Wikipedia

    en.wikipedia.org/wiki/Rabson–Mendenhall_syndrome

    A skin abnormality known as acanthosis nigricans, which involves a discoloration (hyperpigmentation) and "velvety" thickening (hyperkeratosis) of the skin around skin fold regions of the neck, groin and under arms is also a common symptom. [1] Symptoms will negatively impact the daily life of the patient, and will persist until treated.

  7. This Chronic Skin Condition Is A Common Cause Of Dark ... - AOL

    www.aol.com/chronic-skin-condition-common-cause...

    In short, melasma is a chronic skin condition that appears as darkened areas on the face due to an overproduction of melanin, says Gina Charles, MO, a family physician specializing in skincare. It ...

  8. HAIR-AN syndrome - Wikipedia

    en.wikipedia.org/wiki/HAIR-AN_syndrome

    Polydipsia, polyuria (symptoms of insulin resistance are often subclinical) Acanthosis nigricans Verrucous, velvety hyperpigmentation on nape of neck, vulva, axillae, groin, umbilicus, submammary regions; increased skin tags Obesity Increased waist-to-hip ratio (android appearance)

  9. Hyperpigmentation - Wikipedia

    en.wikipedia.org/wiki/Hyperpigmentation

    Acanthosis nigricans—hyperpigmentation of intertriginous areas associated with insulin resistance. Melasma, also known as 'chloasma' or the “mask of pregnancy,” when it occurs in pregnant women.— It is a common skin problem that causes dark discolored patchy hyperpigmentation.