PMC4891553_01
(A) Contrast-enhanced axial CT shows the first LRV (arrow) with a normal course between the abdominal aorta and superior mesenteric artery. (B) At a lower abdominal level, the second LRV (arrow) joins the left common iliac vein posterior to the left common iliac artery. (C) Coronally reformatted CT image shows the double LRV: the first one at a normal anatomic location (yellow arrow) and the second one (green arrow) coursing posterior to the left common iliac artery before its connection to the left common iliac vein (orange arrow). [Powerpoint Slide].
gr1.jpg
PMC4891553_01_gr1.jpg
fig1
The additional LRV, with a distinct renal hilar origin with regard to the first LRV, drained to the left common iliac vein (LCIV) after a course posterior to the left common iliac artery (Fig. 1A, B & C).
PMC4891553_02
(A) Coronally reformatted CT image shows a double LRV with two distinct origins at the left renal hilum. The first LRV (yellow arrow) has a normal anatomic location. The second LRV (orange arrow) has an inferior course draining to the distal IVC. (B) Axial CT image of the lower abdomen shows the connection of the additional LRV (arrow) to the distal IVC. [Powerpoint Slide]
gr2.jpg
PMC4891553_02_gr2.jpg
fig2
CT examination showed, in addition to colonic diverticulosis, two LRV and two left renal arteries. CT multiplanar reformations demonstrated well the two LRV with two distinct origins from the left renal hilum and two separate connections to the inferior vena cava (IVC): one at the normal location and one at the distal IVC (Fig. 2A & B).