I had a stent placed in my iliac vein in 2015 due to being diagnosed with May-Thurner Syndrome and having a blood clot. My clot was cleared immediately with surgery and I had a stent placed. I have had no issues and should have no issues with blood clots after my stent was placed. Is it safe to have a BBL? May-Thurner syndrome (MTS) is caused when the left iliac vein is compressed by the right iliac artery, which increases the risk of deep vein thrombosis (DVT) in the left extremity.