The causes for portal hypertension are classified as originating in the portal venous system before it reaches the liver (prehepatic causes), within the liver (intrahepatic) or between the liver and the heart (post-hepatic). The most common cause is cirrhosis (chronic liver failure). Other causes include: Prehepatic causes * Portal vein thrombosis * Splenic vein thrombosis * Arteriovenous fistula (increased portal blood flow) * Splenomegaly and/or hypersplenism (increased portal blood flow) Hepatic causes * Cirrhosis of any cause. * alcohol use disorder * chronic viral hepatitis *<unk>  atresia *<unk><unk>  cirrhosis *<unk>  sclerosing<unk>  * Chronic pancreatitis * Hereditary haemorrhagic telangiectasia * Schistosomiasis * Congenital hepatic fibrosis * Nodular regenerative hyperplasia * Fibrosis of space of Disse * Granulomatous or infiltrative liver diseases (Gaucher disease, mucopolysaccharidosis, sarcoidosis, lymphoproliferative malignancies, amyloidosis, etc) * Toxicity (from arsenic, copper, vinyl chloride monomers, mineral oil, vitamin A, azathioprine, dacarbazine, methotrexate, amiodarone, etc.) * Viral hepatitis * Fatty liver disease * Veno-occlusive disease Posthepatic causes * Inferior vena cava obstruction * Right-sided heart failure, e.g. from constrictive pericarditis * Budd–Chiari syndrome also known as hepatic vein thrombosis
complications of Primary biliary cholangitis
complications of Gallstone
complications of Amoebiasis
complications of Hepatitis A
complications of Hepatitis E
complications of Cholera
medical cause of Pancreatitis
complications of Hepatitis