There is a woman on the MALS Pals group on Facebook, Robin Schrader, who has had a similar experience of open surgery (2 actually) followed by the artery collapsing from years of compression. I believe she had stents done and then a bypass or is waiting for a bypass. I would think they need to figure out if you have re-compression from scar tissue before deciding what to do (hopefully CTA will show what's going on). If you have re-compression you'll probably need another surgery (just what happened to me) because a stent would likely fail. If the artery has failed but there is no compression then a stent is a great option and would avoid another surgery.

Unfortunately I know nothing about May Turner but it is discussed quite a bit on the MALS groups on Facebook.