title: Crohn's disease of the duodenum: with special reference to duodenoscopy.
mesh_terms: D001706:Biopsy; D003424:Crohn Disease / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004378:Duodenal Diseases / Q000175:diagnosis*; D004386:Duodenum / Q000000981:diagnostic imaging; D004724:Endoscopy; D005336:Fiber Optic Technology / Q000295:instrumentation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography