Definitions for acanthosis nigricans
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Princeton's WordNet
acanthosis nigricans, keratosis nigricans(noun)
a skin disease characterized by dark wartlike patches in the body folds; can be benign or malignant
U.S. National Library of Medicine
Acanthosis Nigricans
A circumscribed melanosis consisting of a brown-pigmented, velvety verrucosity or fine papillomatosis appearing in the axillae and other body folds. It occurs in association with endocrine disorders, underlying malignancy, administration of certain drugs, or as in inherited disorder.
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