Giant duodenal diverticulum leads to Lemmel syndrome with perforation: Eurorad teaching case

Eurorad case: a giant duodenal diverticulum caused Lemmel syndrome (biliary obstruction from a periampullary diverticulum) and perforation. CT showed the diverticulum compressing the common bile duct and free air—a rare, critical diagnosis for radiologists interpreting acute abd…

• Teaching case from Eurorad (European Society of Radiology) illustrating a giant duodenal diverticulum presenting with obstructive jaundice (Lemmel syndrome) and perforation.
• Imaging findings: CT demonstrated the duodenal diverticulum causing mass effect on the distal common bile duct, with free intraperitoneal air indicating perforation.
• Limitation: single illustrative case; not a systematic study.

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