Acanthosis nigricans is a skin disorder characterized by hyperpigmented skin plaques, often in a symmetrical distribution on the neck and axilla.
The skin may appear dirty, rough, and thickened.
The condition can also present on mucosa. It is typically asymptomatic unless it becomes inflamed secondary to bacterial or yeast infection.
Although the pathogenesis of acanthosis nigricans is unknown... more about acanthosis nigricans in our Compendium.
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