Duodenal duplication cyst.
A. A coronal MRCP image of a 6-day-old infant shows a large upper abdominal cyst (C). There is no bile duct dilation. A normal gallbladder (arrow) is present superior to the cyst. B. The cyst (C) is hyperintense on this T2-weighted axial image. The gallbladder (arrow) and liver are normal in appearance. The stomach is located to the leftof the cyst. There are small hyperintense cysts in the superior aspects of the kidneys. C. There is faint echogenic debris within the cyst (C) on this longitudinal sonographic image. The gallbladder (arrow) is normal.