the great mimicker: unique presentation of epidermal inclusion cyst on the breast

Epidermal inclusion cysts (eic) are common cutaneous cysts that can occur nearly anywhere in the body with common locations being the face, scalp, neck, back, and scrotum. only a few cases of eic to the breast have been reported in literature to date, with most occurring after trauma to the breast. here we present the case of a35-year-old woman that presented with a nontraumatic nipple lesion that was later biopsy proven to be an eic. although not a primary consideration, eic should be on the differential for skin lesions of the nipple.