Question 1600
{"accessible":true,"alternatives":[{"id":7972,"text":"choledochocele "},{"id":7968,"text":"duodeno-duodenal intussusception"},{"id":7971,"text":"duodenal duplication cyst"},{"id":7969,"text":"intraluminal duodenal diverticulum (duodenal web)"},{"id":7970,"text":"large duodenal polyp"}],"archived":false,"correctAlternativeId":7969,"explanation":"\u003cp\u003eThis is the typical imaging appearance of\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/duodenal-web\"\u003eintraluminal duodenal diverticulum\u003c/a\u003e (duodenal web). The intraluminal diverticulum appears as a well-circumscribed homogeneous contrast-filled pouch within the duodenal lumen, surrounded by a radiolucent zone (duodenal mucosa), yielding an appearance often likened to that of a \u003ca href=\"/articles/windsock-sign-duodenal-web\" title=\"Windsock sign (duodenal web)\"\u003ewindsock\u003c/a\u003e.\u003c/p\u003e\u003cp\u003eProgressive filling with distension of the diverticulum may produce postprandial fullness, vomiting, or intermittent\u0026nbsp;upper gastrointestinal obstruction\u0026nbsp;as in this case. Between meals the duodenal diverticulum is collapsed, leading to asymptomatic periods. \u003c/p\u003e\u003cp\u003eThe main differential diagnoses are\u003ca href=\"https://radiopaedia.org/articles/\"\u003e\u0026nbsp;\u003c/a\u003eduodenal duplication cyst\u0026nbsp;and\u003ca href=\"https://radiopaedia.org/articles/type-i-choledochal-cyst\"\u003e\u0026nbsp;choledochocele\u003c/a\u003e\u0026nbsp;which can be differentiated by the following imaging findings:\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003ea duplication cyst is not connected to the duodenal lumen therefore will not take-up barium contrast \u003c/p\u003e\u003c/li\u003e\n\u003cli\u003e\u003cp\u003ethe lumen of a choledochocele will be continuous with that of the bile duct\u003c/p\u003e\u003c/li\u003e\n\u003c/ul\u003e","id":1600,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/134/intraluminal-duodenal-diverticulum_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":68096},"imageAttributionCaseInfo":{"title":"Intraluminal duodenal diverticulum","contributor_name":"Ammar Haouimi","contributor_param":"ammar-haouimi","case_rid":68096,"case_param":"intraluminal-duodenal-diverticulum"},"firstQuestionPath":"/questions/1600","nextQuestionPath":null,"relatedArticles":[{"id":23447,"title":"Choledochocele","link":"/articles/choledochocele-1?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA 45-year-old man presented with a history of repeated postprandial vomiting. A barium meal was performed. What is the most likely diagnosis?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1600"}],"attemptsPercentages":[{"alternativeId":"7970","percentage":10},{"alternativeId":"7972","percentage":6},{"alternativeId":"7968","percentage":25},{"alternativeId":"7971","percentage":9},{"alternativeId":"7969","percentage":51}],"promptToLogin":false,"questionManager":false,"articleId":"duodenal-web"}