Dermoscopic Findings in Eruptive Vellus Hair Cysts: A Case Report

Eruptive vellus hair cystsare a type of cutaneous cyst of skin appendageswhich is usually seen in children and teenager. We report a case of 7-yearold girl presented with 2 years history of multiple, small, brown or blue-gray papuleson her chest. Dermoscopic examination of the papulesshowed nonfollicular bluehomogeneous pigmentation. Histopathologically, the cause of bluehomogeneous pigmentation was a cystic structure which was located in the mid- dermisand it had connected to an atrophic hair follicle. We think that non-follicular bluehomogeneous pigmentation is one of unique dermoscopic findings to eruptive vellus hair cystsbecause of its lighter, paler bluecolor with faded outline.