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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.
It is found more commonly in African Americans due to the darker skin and even though both sexes are affected, it is usually found more frequently in males for the thigh and leg regions. [2] A great contributor to this infection is a weakened immune system which comes with aging, therefore the elderly are more susceptible to this disease than ...
Schamberg's disease, (also known as "progressive pigmentary dermatosis of Schamberg", [1] "purpura pigmentosa progressiva" (PPP), [1] and "Schamberg's purpura" [1]) is a chronic discoloration of the skin found in people of all ages, usually only affecting the feet, legs or thighs or a combination. It may occur as a single event or subsequent ...
There are a wide range of depigmenting treatments used for hyperpigmentation conditions, and responses to most are variable. [11]Most often treatment of hyperpigmentation caused by melanin overproduction (such as melasma, acne scarring, liver spots) includes the use of topical depigmenting agents, which vary in their efficacy and safety, as well as in prescription rules.
These skin marks are symptoms of pregnancy caused by the tearing of the dermis, resulting in atrophy and loss of rete ridges. [15] These scars often appear as reddish or bluish streaks on the abdomen, and can also appear on the breasts and thighs. Some of these striae disappear with time, while others remain as permanent discolorations of the body.
Fungal or bacterial infection: The armpit’s naturally dark, damp environment encourages overgrowth of normal skin flora, creating an ideal setting for infectious yeasts to grow and, yes, cause ...
Irregular area of pigmentation (usually dark brown or black) found on the palms, feet, or under the nail; Longitudinal tan, black, or brown streak on a nail; Pigmentation of proximal nail fold; Other uncommon presentations can include: Amelanotic or hypomelanotic areas that may be the same color or lighter than normal skin [13]
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