In a study recently published in the leading journal Blood, Florian Moik and Cihan Ay from the Division of Hematology and Hemastasology of the Department of Medicine I of MedUni Vienna/Vienna General Hospital, working in collaboration with the Division of Oncology, the Department of Dermatology and the dispensary of Vienna General Hospital, provided preliminary data on the incidence, risk factors and clinical outcomes of thrombotic complications in this new form of cancer treatment. The main finding is that, during the course of treatment, approximately 13% of patients develop a venous thromboembolism, that is, a deep vein thrombosis or pulmonary embolism, and approximately 2% develop a thrombosis in the arterial system, including heart attack, stroke, or an acute peripheral arterial occlusion.