Nine cases of Budd-Chiari syndrome are reported. There were 8 cases of primary hepatic vein thrombosis: 2 following abdominal trauma, 2 following pregnancy, 1 in a patient taking contraceptive pills and 3 without definite etiology. The ninth case was a patient with hepatic vein occlusion, secondary to leiomyosarcoma of the inferior vena cava. Angiographic patterns seen on venacavography, selective hepatic venography and selective celiac and mesenteric arteriography were helpful in confirming the diagnosis. Venacavography showed marked compression or complete occlusion of the hepatic segment of the vena cava. In other cases, an irregular circular filling defect at the level of the hepatic veins, or partial occlusion of the hepatic caval lumen with irregular borders were seen. Selective hepatic venography showed: (1) a "spider web" collateral network; or (2) a coarse collateral network. Selective celiac and mesenteric arteriography showed stretched and bowed branches of the hepatic artery, and delayed portal venous filling, with collateral circulation.