“…8,10,12,14 A transient risk factor was found for only 10 patients: one after knee trauma, one after being bedridden for 2 days, one pregnancy with pre-eclampsia, three taking birth-control pills and four after travelling > 4 h by any means of transport (one each of our patients). 8,11,33,38,40 One patient had Behçet's disease, a disorder associated with a higher risk of venous thrombosis. A precipitating factor, mainly major physical exertion (13/63 [20.6%] patients) 8,10,12,14 could partially explain the mechanism of DVT in IVCA.…”