title: Extra-ordinary forms of proctitis.
authors.affiliation: Department of Gastroenterology, University of Amsterdam, The Netherlands.
authors.forename: J F
authors.initials: JF
authors.lastname: Bartelsman
authors.forename: G N
authors.initials: GN
authors.lastname: Tytgat
mesh_terms: D001706:Biopsy; D003424:Crohn Disease / Q000175:diagnosis / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D011349:Proctitis / Q000175:diagnosis* / Q000473:pathology; D011351:Proctoscopy; D012007:Rectum / Q000473:pathology; D012749:Sexually Transmitted Diseases / Q000175:diagnosis / Q000473:pathology