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To study the causes and value of the pseudo-occlusion of the anastomotic pathway between celiacand superior mesenteric arteries. Methods: 15 patients including 12 patients with hepatocellular carcinoma and 3 patients withhepatic hemangioma underwent superior mesenteric arteriography (SMA) and celiac arteriography (CA) in interventional thera-py. The angiographic features of the 15 cases were dynamically observed by 2 experienced radiologists in double-blind manner.Results: Similar interpretations were given by the 2 radiologists. In CA,pseudo-ooclusion occurred at the bifurcation of thecommon hepatic artery and the celiac artery in 8 cases, at the bifurcation of the common hepatic artery and the gastroduodenalartery in 6 cases and at the bifurcation of the right hepatic artery and the celiac artery in 1 case. No occlusion was found inSMA and the angiographic wire and catheter could pass easily through the occluded regions seen in CA. Conclusion: Pseudo-occlusion of the anastomotic pathway between the superior mesenteric and celiac arteries is rare phenomenon. Its cause was notidentified in our cases. It may result from the hemodynamic change or abnormality of the hepatic artery. It is very important tounderstand the existence of pseudo-occlusion in order to guide the catheterization in interventional therapy.