This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
May thurner or cockett syndrome involves 
Select and explain. 
A. Common iliac aery obstruction, B. Internal iliac aery obstruction, C. Internal iliac vein obstruction, D. Left iliac vein compression
D: Left iliac vein compression
Answer: D: Left iliac vein compression 
Explanation: May-Thurner syndrome -- also called iliocaval compression syndrome and Cockett syndrome or iliac vein compression syndrome -- occurs secondary to compression of the left iliac vein by the overriding right iliac aery.The sustained compression and trauma caused by the pulsatile force of the aery on the vein damage the intima and lead to the formation of membranes or bands in the vascular lumen that hinder or obstruct the flow of blood in the vein, oring thrombus formation. The current treatment strategy of choice is endovascular vein patch angioplasty and stenting with the aim of improving the caliber of the lumen and enabling normal venous drainage