A 9-year-old female patient with palpable epigastric mass was found to have a large cystic mass in the epigastrium on US examination (not shown). An abdominal CT study was planned for better assessment of the anatomic relationship of this lesion. Axial plane post-contrast CT image shows a huge cystic mass (arrows) compressing and displacing the stomach (star). Surgery confirmed gastric duplication cyst