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World J Radiol. Aug 28, 2014; 6(8): 613-618
Published online Aug 28, 2014. doi: 10.4329/wjr.v6.i8.613
Figure 4
Figure 4 Upper gastrointestinal barium study (A) shows a band like extrinsic narrowing of the first part of the duodenum (arrow), axial computed tomography image (B) reveals the anomalous position of the portal vein anterior to the duodenum (arrow) suggestive of preduodenal portal vein.