Inferior vena cava duplication
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Two inferior vena cavas are seen on both sides of the aorta. The left inferior vena cava drains into the left renal vein.
A tiny radio-dense calculus is seen in the upper pole of the right kidney.
Inferior vena cava duplication is a rare vascular anomaly usually diagnosed as an incidental finding. It results from a persistent left supra-cardinal vein and is often associated with renal anomalies.