ABSTRACT
Trichoadenoma is an uncommon benign tumor originating from the infundibular part of the pilosebaceous unit. Generally, it appears as a skin-colored papule clinically indistinguishable from basal cell carcinoma. It is histopathologically characterized by cystic structures, lined by a stratified epithelium with infundibular differentiation. The stroma is poorly expressed, and hair shafts are generally absent. The dermoscopic appearance of trichoadenoma has not been described before. We reported a case in a 45-year-old man, in which common criteria for basal cell carcinoma were visible, such as in-focus vessels, shiny white lines and blue-gray ovoidal nest; however, small whitish circles could also be identified, probably related to the cystic structure of this tumor.
