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Fig. 3. 48-year-old woman with venous anomaly.
Maximum-intensity-projection image from MR angiogram (TR/TE, 5.0/2.0; flip
angle, 20°) obtained during venous phase shows prominent retroaortic left
renal vein (arrow) entering inferior vena cava lower than expected
position of left renal vein. No circumaortic component was seen. Single renal
arteries can be seen bilaterally. Venous anomaly was confirmed at time of left
nephrectomy.