STP can extend into the DVS. In this series STP of the proximal greater saphenous vein extended into the common femoral vein in 8.6% of the cases, of which 10% embolized to the lungs. When the DVS is involved, standard deep venous thrombosis treatment (heparin, warfarin, bed rest) should be instituted. We recommend duplex imaging for STP involving the greater saphenous vein in the thigh to rule out occult deep venous thrombosis. STP is not always benign and self-limiting as previously described.
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