Prehepatic |
Portal vein thrombosis |
Splenic vein thrombosis |
Splanchnic arteriovenous fistula |
Splenomegaly (eg, from lymphoma, Gaucher's disease*) |
Intrahepatic |
Presinusoidal |
Schistosomiasis* |
Idiopathic noncirrhotic portal hypertension (including nodular regenerative hyperplasia) |
Primary biliary cholangitis |
Sarcoidosis* |
Congenital hepatic fibrosis |
Primary sclerosing cholangitis |
Hepatic arteriopetal fistula |
Adult polycystic liver disease |
Arteriovenous fistulas |
Autoimmune cholangiopathy |
Vinyl chloride toxicity* |
Neoplastic occlusion of the intrahepatic portal vein |
Mineral oil granuloma* |
Sinusoidal |
Arsenic poisoning |
Vinyl chloride toxicity* |
Drugs (eg, amiodarone, methotrexate) |
Alcoholic liver disease* |
Nonalcoholic fatty liver disease |
Gaucher's disease* |
Zellweger syndrome |
Viral hepatitis |
Chronic Q fever |
Schistosomiasis* |
Amyloid or light-chain deposition in the space of Disse |
Acute hepatic injury |
Mastocytosis |
Agnogenic myeloid metaplasia |
Acute fatty liver of pregnancy |
Postsinusoidal |
Sinusoidal obstruction syndrome (venoocclusive disease) |
Budd-Chiari syndrome* |
Alcoholic liver disease* |
Chronic radiation injury |
Vitamin A toxicity |
Epithelioid hemangioendothelioma |
Angiosarcoma |
Sarcoidosis* |
Mycobacterium avium or M. intracellulare infection |
Mineral oil granuloma* |
Posthepatic |
IVC obstruction (eg, Budd-Chiari syndrome*) |
Cardiac disease (constrictive pericarditis, restrictive cardiomyopathy) |
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