The aim of this Register Trial is to systematically study the epidemiology, risk factors, liver function as well prognosis of patients with vascular liver diseases. Furthermore, important clinical parameters will be assessed in order to evaluate patients' coagulation status and in order to develop new biomarkers derived from blood, urine, stool or ascites of patients as well as histological samples from the upper / lower GI-tract or the liver in order to better understand the natural history of vascular liver diseases.