title: 'Grey case'.
authors.affiliation: Department of Genitourinary Medicine, Radcliffe Infirmary, Oxford, UK.
authors.forename: J
authors.initials: J
authors.lastname: Sherrard
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D016905:Gram-Negative Bacterial Infections / Q000175:diagnosis*; D006801:Humans; D008297:Male; D010409:Penile Diseases / Q000175:diagnosis*; D012883:Skin Ulcer / Q000175:diagnosis*; D014526:Urethritis / Q000175:diagnosis*