Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 58 12 2021 01 04 658 661 Susan Mohammadi Department of Radiology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran. Nastaran Hesam Shariati School of Medical Sciences, Faculty of Medicine and Health, University of Sydney, Camperdown, Australia . Fardin Fathi Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran. Siamak Arshadi Department of Radiology, Besat Hospital, Kurdistan University of Medical Sciences, Sanandaj, Iran. Fahimeh Rajabi Department of Radiology, Besat Hospital, Kurdistan University of Medical Sciences, Sanandaj, Iran. Mohammad Bakhtiar Hesam Shariati Department of Anatomical Science, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran. 2020 04 22 2020 10 14 A lack of congenital Inferior Vena Cava (IVC) is an uncommon malformation that has been identified in combination with idiopathic Deep Venous Thrombosis (DVT), exclusively. It may not even be revealed during the lifetime. A 63-year-old female was accepted with three months of abdominal and pelvic pain and localized edema on the right flank. During this admission, she was examined and recognized for deep vein thrombosis (DVT). Ct scan images showed a lack of the Inferior Vena Cava with enormous thrombosis collaterals of the superficial vein in the abdomen. In this case report, we report a woman with side pain who has an absence of the IVC.   https://acta.tums.ac.ir/index.php/acta/article/view/8416