Cancer-associated ischemic stroke: current knowledge and future directions

Because cancer is a strong prothrombotic, there is an increased risk of thromboembolism, which includes ischemic stroke, especially in the first six to twelve months following a cancer diagnosis. The risk of ischemic stroke differs according to the location and stage of cancer. Given that the risk increases prior to a cancer diagnosis, stroke may be the initial sign of occult cancer. Although data on the risk, treatment, and outcomes of cancer-associated stroke are more limited than those on cancer-associated venous thromboembolism, the condition is still recognized as a thrombotic complication of cancer. Up to 10% of ischemic stroke patients also have a concurrent cancer diagnosis, and these patients seem to have higher short-term mortality and morbidity rates. With more people expected to survive longer after cancer treatment and an increasing number of cancer survivors, the burden of stroke among cancer patients is predicted to rise. This narrative review aims to provide an overview of the pathophysiologic mechanisms, treatment options, and epidemiology of ischemic stroke, including cancer screening for those who have cryptogenic (unexplained) stroke.