Keywords: AF, angiofibroma; BHD, Birt-Hogg-Dube; Birt-Hogg-Dube syndrome; FCCH, folliculocystic and collagen hamartoma; FCP, fibrous cephalic plaque; TSC, tuberous sclerosis complex; angiofibroma; fibrofolliculoma; fibrous cephalic plaque; mTOR; mTORC1, mammalian target of rapamycin complex 1; tuberous sclerosis.