title: A nonhealing ulcer on the face.
authors.affiliation: State University of New York at Stony Brook, USA.
authors.forename: D K
authors.initials: DK
authors.lastname: Sun
authors.forename: D M
authors.initials: DM
authors.lastname: Siegel
mesh_terms: D000368:Aged; D005148:Facial Dermatoses / Q000473:pathology*; D006801:Humans; D008297:Male; D012883:Skin Ulcer / Q000473:pathology*