Portal vein thrombosis is the most common vascular disorder. Vein thromboses are present by inflammation, trauma, hypercoagulative and thrombophilic states. The treatment of portal vein thrombosis is local thrombolysis, endovascular stent, transjugular intrahepatic porto-systemic stent (TIPS), surgical thrombectomy or mesenterico-portal by-pass. The first choice treatment in hepatic vein thrombosis is TIPS, transplantation is the definitive solution. Thrombosis and stenosis of hepatic artery are often present after liver transplantation. If thrombosis occurs, surgical thrombectomy or retransplantation is needed. Hepatic artery aneurysm and arterioportal fistula are most common of iatrogenic origin. The treatment is possible by angiographic embolisation or surgical reconstruction. Suddenly onset of portal hypertension with acute abdomen and hematemesis are present in clinical picture. In hepatic artery thrombosis hepatic insufficiency is involved. Color Duplex ultrasonography (CDU) is the first diagnostic tool, other are: CT, MRI, CT-AG, MR-AG or AG. Promt and correct diagnosis are the tools to the adequate treatment.