title: Unusual huge erythema annulare centrifugum presentation of second syphilis.
authors.forename: Z-H
authors.initials: ZH
authors.lastname: Liu
authors.forename: J-F
authors.initials: JF
authors.lastname: Chen
mesh_terms: D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D004890:Erythema / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010402:Penicillin G Procaine / Q000627:therapeutic use; D017192:Skin Diseases, Bacterial / Q000175:diagnosis* / Q000188:drug therapy; D012873:Skin Diseases, Genetic / Q000175:diagnosis*; D013587:Syphilis / Q000175:diagnosis* / Q000188:drug therapy; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents; D010402:Penicillin G Procaine