Implementation of new endovenous treatments in therapy for lateral embryonic veins.

Klippel-Trénaunay syndrome is characterized by a persistent lateral embryonic vein. This so-called marginal vein has a large diameter causing venous stasis and venous hypertension because of the absence of valves along its entire length. The extensive diameter of the vein impedes successful treatment by sclerotherapy. Surgical removal is considered technically challenging for potential severe intraoperative blood loss due to the large perforators to the deep veins. Here we show that endovenous treatments (laser ablation, cyanoacrylate adhesive) might be feasible options in therapy for lateral embryonic veins.