Patients with malignancies are at increased risks of venous thromboembolism (VTE). The annual incidence of VTE in cancer patients is 0.5%, which is 5-fold more than the general population . Low molecular weight heparin (LMWH) has been the standard treatment for malignancy-associated VTE. This recommendation follows the results of the Randomized Comparison of Low-Molecular-Weight Heparin versus Oral Anticoagulant Therapy for the Prevention of Recurrent VenousThromboembolism in Patients with Cancer (CLOT) trial, which showed superiority of Low molecular weight heparin (LMWH) over warfarin in cancer patients with VTE .