Iliac Vein Compression Syndrome: 

Iliac Vein Compression Syndrome is a condition in which compression of the iliac vein(s) in the pelvis causes discomfort, swelling, pain and often times, blood clots. May-Thurner Syndrome (a form of IVCS) is a condition where the left iliac vein is compressed by the right iliac artery. 

Common signs and symptoms include:  

  • Redness and swelling 
  • Deep vein thrombosis (and associated symptoms)  
  • Pain or throbbing in the leg 
  • Skin changes 
  • Dilated or large veins