Complex Arterial and Venous Thrombosis in Polycythemia Vera: what Does Leukocytosis Predict?

Thromboembolic events represent the main cause of morbidity and mortality in patients with polycythemia vera. Leukocytosis has been identified as an important risk factor for development vascular thrombosis. A 47-year-old woman vera presented pain swelling her right calf. She was scheduled to receive anagrelide which effective on thrombocytosis, but leukocytosis persisted. diagnosed thrombosis popliteal vein left common femoral by duplex ultrasonography. We suggested a role inducing thrombotic phenomenon our patient