Abstract
In patients with acute leukemia (AL), coagulation disorders, which include both thrombotic and hemorrhagic events, are part of the clinical spectrum both at diagnosis and during its evolution. The incidence of these events has been reported by several authors in the range of 1-36%. This heterogeneity appears to be related to the type of patients included, the study design, and patient-related factors as well as the treatment used. The pathophysiology of thrombosis in AL is complex and multifactorial and includes a myriad of factors that contribute to cancer procoagulant state: synthesis of procoagulant factors by circulating blasts, cellular microparticles, use of endovascular devices (catheters), type of chemotherapy used (L-asparaginase) to name a few. Currently, treatment relies in the use of heparin, followed by vitamin K antagonists for 3 to 6months. However, randomized controlled studies are required in patients with AL and thrombosis to confirm its safety, duration, and effectiveness.
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