A case of nevoid acanthosis nigricans.

Sir, Naevoid acanthosis nigricans (AN) is an extremely rare form of AN that can manifest with a characteristic naevoid appearance at any age before puberty (1 – 3). It is not associated with any known syndrome, endocrinopathy, drugs or internal malignancy (1 – 3) and, thus far, there have been only 2 case reports in the literature of naevoid AN with a unilateral distribution (1, 2). We report a case of a naevoid AN closely resembling an epidermal naevus occurring on the midline of the abdomen, including the umbilicus, which is an unusual site.