Location: Medial (70%) descending duodenum in periampullary region, 3rd or 4th portion (26%), lateral (4%) descending duodenum
Filling defects within diverticulum (food and gas)
CT: Fluid-filled diverticulum may simulate cystic mass in pancreatic head
CT usually shows air-fluid level within diverticulum
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Intraluminal diverticula
“Windsock” appearance: Barium-filled, globular structure of variable length, originating in 2nd portion of duodenum, fundus extending into 3rd portion; outlined by thin, radiolucent line
CT: Contrast medium and gas within diverticulum, surrounded by contrast in duodenal lumen; separated by thin wall of diverticulum
TOP DIFFERENTIAL DIAGNOSES
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Pancreatic cystic tumor
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Perforated duodenal ulcer
