title: Postbulbar duodenal ulcer and ring-stricture. Cause and effect.
mesh_terms: D000328:Adult; D000368:Aged; D003250:Constriction; D004378:Duodenal Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D004381:Duodenal Ulcer / Q000000981:diagnostic imaging*; D004386:Duodenum / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000150:complications; D010438:Peptic Ulcer Hemorrhage / Q000150:complications; D011859:Radiography