title: Occlusion of the inferior vena cava and left iliac venous system with collateral venous channels.
mesh_terms: D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging*; D003097:Collateral Circulation; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014682:Vena Cava, Inferior