en Gross Anatomy Gross Anatomy News and Reports News and Reports <div style="text-align: justify;">Awareness of the variation and renal vascular abnormality at retroperitoneal space surgeries such as kidney surgery and transplantation is very important and necessary. Complexity in the veins development of the kidney area of fetus leads to a series of changes in the production of these veins, including the extra kidney vein, and the posterior aorta vein. In this case report, we present a case report of a 36-year-old male with a rare renal variation which has been identified with a simple abdominal Computed Tomography (CT) scan (16-slice). In this case report, there is a single renal vein which becomes two branches before drainage into Inferior Vena Cava (IVC) in which one of these branches passes anterior to aorta and the other posterior to aorta which suggests the type of circumaortic left renal vein.</div> Vena Cava, Inferior, Renal veins, Anatomic variation, CT angiography 103 106 http://anatomyjournal.ir/browse.php?a_code=A-10-230-1&slc_lang=en&sid=1 Susan Mohammadi dr.susanmohammadi@gmail.com 10031947532846003370 10031947532846003370 No Department of Radiology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran. Mohammad Sadegh Gholami Farashah sadegh.farashahi@yahoo.com 10031947532846003371 10031947532846003371 No Department of Anatomical Sciences & Histology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. Reza Asghari Rasghari57@yahoo.com 10031947532846003372 10031947532846003372 No Department of Anatomical Sciences & Histology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran. Fahimeh Rajabi fahimeh.rajabi.ff@gmail.com 10031947532846003373 10031947532846003373 No Department of Radiology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran. Nastaran Hesam Shariati nastaran_shariati@yahoo.com 10031947532846003374 10031947532846003374 No Department of Biomedical Science, University of Sydney, Lidcombe, Australia. Mohammad Bakhtiar Hesam Shariati b.hesamshariati@gmail.com 10031947532846003375 10031947532846003375 Yes Department of Anatomical Sciences & Histology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.