Causes of Budd-Chiari Syndrome

Idiopathic
Hematological disorders
Polycythemia rubra vera
Essential thrombocytosis
Myeloproliferative disorders
Paroxysmal nocturnal hemoglobinuria
Lupus anticoagulant
Antithrombin III deficiency
Protein C deficiency
Oral contraceptive use
Foods
Pyrrolizidine alkaloids
Aflatoxicosis
High-dose chemotherapy
Miscellaneous
Benign and malignant liver tumors
Extrahepatic tumors
Infections
Trauma
Membranous webs

Thrombotic form (70% cases) for hematological disorders, compression or invasion of the hepatic vein, hypercoagulable state