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Axial contrast-enhanced computed tomography images. The horizontal duodenal leg is not anchored to the retroperitoneum and passes through the ventral side of the superior mesenteric artery (SMA). There is clockwise rotation of the mesentery around the SMA and narrowing of the intestine. The main trunk of the superior mesenteric vein (SMV) is disrupted at the tortuosity, and collateral vessels to the portal vein are well developed.
