Eruptive Vellus Hair Cysts of the Labia Majora: Detection of Openings of the Cysts to the Epidermis by Dermoscopy

The study focused on eruptive vellus hair cysts (EVHC) located on the labia majora, which are typically small, asymptomatic papules with a smooth or centrally umbilicated surface. Using dermoscopy, the researchers detected openings of these cysts to the epidermis. This finding provided a non-invasive method to identify and study EVHC, which are histopathologically characterized as epidermoid cysts. The research was conducted by the Department of Dermatology at Kinki University Faculty of Medicine in Japan.