Duodenal Duplication

Etiology: abnormal budding of gastrointestinal tract lined with GI epithelium, may communicate with enteric lumen proper
US: cystic lesion with echogenic rim sign = enteric signature = hyperechoic inner layer of cyst representing bowel mucosa

Cases of Duodenal Duplication

UGI of duodenal duplication — 3 lateral images from an UGI show persistent narrowing of the second portion of the duodenum caused by a round extrinsic mass.