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  2. 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.

  3. 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.

  4. 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]

  5. 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.

  6. Alström syndrome - Wikipedia

    en.wikipedia.org/wiki/Alström_syndrome

    A prognosis for Alström syndrome is complicated because it widely varies. Any person that has the syndrome have different set of disorders. Permanent blindness, deafness and type 2 diabetes may occur. Liver and kidney failure can progressively get worse. The life expectancy is usually reduced and the patients rarely live past 50 years old. [10 ...

  7. Cushing's syndrome - Wikipedia

    en.wikipedia.org/wiki/Cushing's_syndrome

    Cushing's syndrome is a collection of signs and symptoms due to prolonged exposure to glucocorticoids such as cortisol. [4] [9] [10] Signs and symptoms may include high blood pressure, abdominal obesity but with thin arms and legs, reddish stretch marks, a round red face due to facial plethora, [11] a fat lump between the shoulders, weak muscles, weak bones, acne, and fragile skin that heals ...

  8. Beare–Stevenson cutis gyrata syndrome - Wikipedia

    en.wikipedia.org/wiki/Beare–Stevenson_cutis...

    Beare–Stevenson cutis gyrata syndrome is a rare genetic disorder characterized by craniosynostosis (premature fusion of certain bones of the skull, sometimes resulting in a characteristic 'cloverleaf skull'; further growth of the skull is prevented, and therefore the shape of the head and face is abnormal) and a specific skin abnormality, called cutis gyrata, characterized by a furrowed and ...

  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.