 Portal vein thrombosis PVT refers to an obstruction in the trunk of the portal vein. It can extend downstream to the portal branches, or upstream to the splenic andor the mesenteric veins. The prevalence of PVT is 10-25 and incidence is about 16 in cirrhotic patients. Recent studies demonstrate that the presence of PVT is not only an independent predictor of failure to control active variceal bleeding and prevent variceal rebleeding, but also significantly associated with increased mortality in patients with liver cirrhosis. 