“…Previously reported conditions that predispose to thrombosis are myeloproliferative disorders such as polycythemia vera and essential thrombocytosis, including preclinical stage, 10 and abnormal clotting tendencies due to deficiencies of antithrombin III, 11 protein C, 12,13 or protein S, 14 blood constituents that protect against thrombosis. Oral contraceptive use, 15 the presence of lupus anticoagulant 16 and anticardiolipin antibodies, 17 paroxysmal nocturnal hemoglobinuria (PNH), 18 and factor V Leiden mutation 19 also predispose to thrombosis. Less well documented associations were reported, such as ulcerative colitis, 20 Behcet's disease, 21 fat overload syndrome, 22 idiopathic granulomatous venulitis, 23 and pregnancy.…”