title: Young man presenting with a genital lesion.
authors.affiliation: George Washington University, Washington, DC, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Nettina
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D010401:Penicillin G Benzathine / Q000008:administration & dosage*; D010406:Penicillins / Q000008:administration & dosage*; D011320:Primary Health Care / Q000379:methods; D013587:Syphilis / Q000175:diagnosis* / Q000188:drug therapy* / Q000453:epidemiology; D014481:United States / Q000453:epidemiology
chemical_list: D010406:Penicillins; D010401:Penicillin G Benzathine