Lemmel syndrome


CT features of a duodenal diverticulum arising from the second part of duodenum compressing the distal CBD with no sign of diverticulitis or perforation most consistent with Lemmel syndrome

Lemmel syndrome is defined as obstructive jaundice caused by a periampullary duodenal diverticulum compressing the intrapancreatic common bile duct with resultant bile duct dilatation.