Patients who experienced venous thrombosis compared to those without thrombosis had significantly abnormal parameters of lupus anticoagulant, protein C, protein S and activated protein C resistance, though their hyper-coagulation was corrected after renal transplantation.20 In the present study there was no significant association between the incidence of catheter thrombosis and hereditary thrombophilia factors. This evidence concerns the gene PROS1 and inherited thrombophilia.