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Contrast-enhanced computed tomography image and upper gastrointestinal radiograph. A: Contrast-enhanced computed tomography image of the lesion. Red arrow: Thickened and obstructed duodenum (the lesion looks like an increased fat tissue concentration around the duodenum); yellow arrow: Pancreaticoduodenal groove; blue arrow: Dilated pancreatic duct; B: Upper gastrointestinal radiograph showing that there was no contrast agent entering the descending duodenum.
