May-Thurner Syndrome Presenting as Recurrent Isolated Left-sided Deep Vein Thrombosis

We present a case of a 62-year-old man who had no symptoms of venous insufficiency, with left leg swelling and pain a few days after being treated for floating deep vein thrombosis (DVT), whose condition was subsequently diagnosed as May-Thurner syndrome (MTS). This report highlights the importance of a broad differential diagnosis that includes MTS and considers anatomic abnormalities in situations of unprovoked, persistent DVT of the lower extremities.