A 52-year-old Japanese woman presented with a 1.5-cm black, glossy, flat, pediculated lump that clinically mimicked a melanocytic nevus on the left temporal side of her head. The subcutaneous tumor beneath the nodule was elastic and hard. A histological examination showed that the tumor was well circumscribed with an exo-and endophytic growth 2.4 × 1.9 cm in size. The lesion contained several keratinous cysts and was composed of funicular fascicles containing squamoid cells. Excessive mucinous material deposition was observed around the tumor periphery and a palisading arrangement of nuclei in the tumor periphery was seen in some areas. Based on these findings, a diagnosis of infundibulocystic basal cell carcinoma (IFC-BCC) was made. This report presents a case of IFC-BCC that clinically mimicked a melanocytic nevus and was also associated with epidermal cysts.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.