A 34-year old woman with rheumatic mitral stenosis was found to have complete dual inferior venae cavae with bilateral infrarenal and suprarenal segments, on balloon mitral valvuloplasty. The bilateral, renal, and gonadal veins drained separately on the ipsilateral side. The left inferior vena cava was larger than the right, and the right inferior vena cava had an aneurysmal dilatation near its origin. The left inferior vena cava drained into the superior vena cava-right atrial junction.
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