Medical Term:
acanthosis nigricans
Definition: an eruption of velvety, warty benign growths and hyperpigmentation on the skin of the axillae, neck, anogenital area, and groin; in adults, may be associated with internal malignancy, endocrine disorders (characterized by insulin resistance), or obesity; seen in Type 2 diabetes in adolescents; a benign hereditary type occurs in children.
[L. fr. niger, black]
See Also: pseudoacanthosis nigricans
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