Gastric Duplication

Etiology: Abnormal budding of gastrointestinal tract lined with gastrointestinal epithelium which may communicate with enteric lumen proper
Imaging US: Cystic lesion with echogenic rim sign = enteric signature (gut signature) = hyperechoic inner layer of cyst representing bowel mucosa
DDX: Ovarian cyst, mesenteric cyst, omental cyst
Complications: May cause obstruction, bleeding
Treatment: Elective surgical removal
Clinical:

Radiology Cases of Gastric Duplication

US of pediatric gastric duplication — Transverse (above) and sagittal (below) US of the left upper quadrant of the abdomen shows a large round anechoic lesion anterior to the stomach. The inner layer of the lesion is hyperechoic (echogenic rim sign).

UGI and US of gastric duplication — Lateral image from an UGI shows narrowing of the antrum of the stomach, which persisted throughout the exam. Sagittal US of the same region shows a cystic mass with an echogenic central rim.