Fig. 5From: Imaging of non-neoplastic duodenal diseases. A pictorial review with emphasis on MDCTIntraduodenal diverticulum in a 58-year-old woman. Single-contrast upper gastrointestinal study in the right anterior oblique projection shows a well-defined oval lesion (arrow) surrounded by a radiotransparent halo (“windsock” sign). The lesion contains oral contrast material and projects into the true duodenal lumenBack to article page