Acanthosis nigricans - close-up
   
Acanthosis nigricans - close-up

This photograph demonstrates the hyperpigmented, brownish, velvety lesions of acanthosis nigricans. This skin condition may occur in skin folds such as the axilla (armpit - pictured here), neck, and other areas. In adults, it may be associated with hormonal problems, internal malignancy, obesity, and drugs.

Review Date: 5/28/2024
Reviewed By: Ramin Fathi, MD, FAAD, Director, Phoenix Surgical Dermatology Group, Phoenix, AZ. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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