**Abstract**

Cancer is one of the leading causes of death in developed countries, and cancer patients often develop venous thromboembolism (VTE). VTE is the second leading cause of death in cancer patients receiving chemotherapy. The incidence of VTE varies among cancers, and it is highest in pancreatic cancer patients. Increased white blood cells and thrombocytosis are risk factors for developing cancerassociated VTE. Some other proteins (tissue factor, podoplanin, P-selectin, and plasminogen activator inhibitor-1) may also play roles in thrombus formation in cancer patients. Certain diets and nutrition (e.g., enough fish, vegetables, and fruits) may reduce the risk of VTE. Certain diets and nutrition also may reduce the risk of cancer, and alcohol drinking and cigarette smoking definitely increase risk of cancer. Some studies suggest that aspirin, a widely used antiplatelet drug, may reduce cancer incidence and mortality, but other studies fail to show the beneficial effects of aspirin.

**Keywords:** cancer, venous thromboembolism, fish, vegetables, aspirin
