Splanchnic vein thromboses include thrombosis of the portal venous system (including the portal, mesenteric and splenic vein) and hepatic vein thrombosis (also called Budd-Chiari syndrome). They are rare manifestations of venous thromboembolism. These thromboses are frequently associated with local or systemic factors. The therapeutic approach is often complex due to heterogeneity of patients and limited available data in the literature. The cornerstone of treatment is anticoagulation. However, the bleeding risk, related to portal hypertension, should be accurately assessed to individualize the treatment. A multidisciplinary consultation team including several specialists is provided at the University Hospitals of Geneva for the optimal management of those patients.