Dermoscopic findings in a case of multiple subungual fibromas.

Periungual and subungual fibromas, also known as Koenen tumors, are diagnostic findings of tuberous sclerosis. The clinical appearance and histological features that characterize ungual fibromas are well defined. However, dermoscopic findings of these benign tumors have not been reported previously. Here we report a rare presentation of multiple subungual fibromas of all fingers in a developmentally delayed patient with tuberous sclerosis along with the dermoscopic features of the ungual tumors.