RT Journal Article SR Electronic T1 Factor V Leiden: How great is the risk of venous thromboembolism? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 265 OP 272 DO 10.3949/ccjm.79a.11072 VO 79 IS 4 A1 Khaldoon Shaheen A1 M. Chadi Alraies A1 Abdul Hamid Alraiyes A1 Richard Christie YR 2012 UL http://www.ccjm.org/content/79/4/265.abstract AB The factor V Leiden mutation, the most common inherited cause of thrombophilia, causes a mild hypercoagulable state. We describe a 29-year-old man, heterozygous for factor V Leiden, who developed extensive pulmonary emboli with concomitant bilateral deep venous thrombosis, likely provoked by prolonged immobility during a car trip. We then review the diagnosis, therapy, screening, and prognosis of venous thromboembolism related to factor V Leiden.