<prompt> Budd - Chiari Syndrome occurs in:Antithrombin deficiencyProtein C deficiencyOral contraceptive useAll of the above  <response>: All of the above 336, 627, 1862, 1874-H 16th 612-13-CMDT-09 362, 661, 733,1945, 1990-Hl7thBUDD-CHIAR1 SYNDROME Hepatic vein obstruction Many cases associated with polycythemia vera or other proliferative diseases Predisposition to thrombosis e.g. - hyperprothrombinemia factor II G20210 A mutation activated protein C resistance Factor V Leiden mutation Protein C or S or antithrombin deficiency, the methylenetetrahydro folate reductase mutation, antiphospholipid antibodies can be identified. Right sided heart failure or constrictive pericarditis, neoplasm. Paroxysmal nocturnal hemoglobinuria, Behcets syndrome blunt abdominal trauma, use of oral contraceptives and pregnancy. Cytotoxic agents and pyrrolizidine alkaloids bush teasThe screening test of choice is colour or pulsed Doppler ultrasonography 