PMC5588555_01
a MIP axial view of the RAs. The CT image shows both RAs (arrows) with low calibration arising from the proximal AA. The image also reveals an anomaly known as the nutcracker syndrome between the superior mesenteric artery and the AA. RRA = Right RA; LRA = left RA. b MIP axial view of the variant isthmic artery. The CT image shows a single large aberrant RA (asterisk) originating from the distal AA. c Schematic view of the arterial supply of the HSK revealing normally positioned small right and left RAs and a significant aberrant RA with a large calibration.
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The CT images also revealed the left renal vein compression with proximal distention without the presence of collateral pathways between the superior mesenteric artery and the AA (fig. 1a). The HSK was vascularized by normally positioned small right and left RAs, and a significant aberrant RA originating from the distal AA (fig. 1a, b).