this article presents a review of major venous anomalies including ( 1 ) transposition of the inferior vena cava , ( 2 ) double vena cava , ( 3 ) retroaortic left renal vein , ( 4 ) circumaortic renal collar , and ( 5 ) preaortic iliac venous confluence .
C0042458
inferior vena cava
C0042460
vena cava