PT - JOURNAL ARTICLE AU - Umakanth, Suhas AU - Karnik, Swapneel Avinash AU - Kashyap, Alankrith Ramesh AU - Lakshminarayana, Badareesh TI - May-Thurner syndrome: an unusual cause of unprovoked deep vein thrombosis of the left lower limb AID - 10.1136/bcr-2021-244103 DP - 2022 Jan 01 TA - BMJ Case Reports PG - e244103 VI - 15 IP - 1 4099 - http://casereports.bmj.com/content/15/1/e244103.short 4100 - http://casereports.bmj.com/content/15/1/e244103.full SO - BMJ Case Reports2022 Jan 01; 15 AB - May-Thurner syndrome, an unprovoked form of deep vein thrombosis (DVT), should be kept in mind in case of DVT with no predisposing factors. We present a case of a 37-year-old male with DVT of left lower limb due to May-Thurner syndrome, treated with anticoagulants with a plan of left common iliac vein (LCIV) stenting and inferior vena cava (IVC) filter later. Venous duplex scan showed features suggestive of May-Thurner syndrome. Hence, we proceeded for CT abdominal aortogram with bilateral lower limb angiogram, which confirmed the above findings. Management of May-Thurner syndrome is a stepwise approach, with initial anticoagulation for dissolution of the thrombus followed by endovenous stenting of the LCIV and concomitant IVC filter.