Increasingly, endovenous ablation of the greater saphenous vein (GSV) is used for the treatment of symptomatic varicose veins. The propagation of thrombus can result in a “tail of thrombus” within the common femoral vein (CFV). In two cases, patients were treated with low molecular weight heparin and re-imaged within 1 week. In both cases, complete resolution of the thrombus was confirmed, and anticoagulation was discontinued. Thrombus extension into the CFV after endovenous ablation may be safely treated with short-term anticoagulation and followed by duplex ultrasound. If unresolved, standard deep vein thrombosis anticoagulation is indicated.
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