Causes
Causes can be divided into prehepatic, intrahepatic, and posthepatic. Intrahepatic causes include liver cirrhosis, and hepatic fibrosis (e.g. due to Wilson's disease, hemochromatosis, or congenital fibrosis). Prehepatic causes include portal vein thrombosis or congenital atresia. Posthepatic obstruction occurs at any level between liver and right heart, including hepatic vein thrombosis, inferior vena cava thrombosis, inferior vena cava congenital malformation, and constrictive pericarditis.
Read more about this topic: Portal Hypertension