A Report of Unusual Case of Acquired Dermal Melanocytosis on the Scalp of a Caucasian Man with a Literature Review.

Dermal melanocytosis includes several benign pigmented lesions which present as blue-gray color which is a result of the color transmission of melanin pigment through the dermis. While some types are present at birth, there is an acquired variant, acquired dermal melanocytosis (ADM), which usually involves faces of middle-aged Asian women. To the best of our knowledge, there are limited reports of extra facial ADM which all are on the trunk and extremities. Herein, we report a unique case of extra facial ADM affecting the scalp of a middle-aged man and provide a review of all extra facial ADM cases that have been reported.