title: [Cutaneous horn on the head and cheek: report of four cases].
authors: Ya-Rong
authors: YR
authors: Wang
authors: Bin-Yu
authors: BY
authors: Liu
authors: Bin-Yan
authors: BY
authors: Liu
mesh_terms: D002610:Cheek / Q000473:pathology*; D006257:Head / Q000473:pathology*; D006801:Humans; D007642:Keratosis / Q000175:diagnosis*