Pelvic Venous Disease Treatments Also known as pelvic congestion syndrome. Stent Placement for Iliac Vein Compression or May Thurner Syndrome – The stent is placed into the left common iliac vein where it is compressed between the right iliac artery and spine to keep the vein open and increase blood flow through this previously narrowed area and potentially decreasing left leg swelling as well as other symptoms. Embolization – This treatment prevents retrograde blood flow and decreases the pressure o varicose veins in the pelvis. Sclerotherapy Port Catheter Placement A device placed completely under the skin on either side of the chest, typically for cancer patients who need regular IV access for chemotherapy.