Acanthosis nigricans in adolescents. Two case reports and guidelines for management.

Acanthosis nigricans (AN) is a dermatologic condition of the flexor surfaces of the body consisting of papular hypertrophy, hyperpigmentation, and rugae. AN is commonly associated with malignancy when in adults but is primarily associated with endocrinologic disorders and obesity when found in adolescents. A special search for occult malignancy is not warranted in adolescents with AN unless no associated benign condition is found. Careful follow-up is recommended, however, since AN may be the first indication of a serious systemic disease.