They hardly do them anymore due to the poor success rate.

I have TOS and RSDS. I have had TOS surgery on the right side to remove a rib and had surgery under my left arm in 2004 to remove muscle to let the ribs spread.
I just saw my TOS surgeon Thursday and am having pectoris Minor surgery under both arms due to an auto accident. They are now doing this a lot of times instead of taking out a rib. They have found a lot of peoples problems with TOS do come from this.
You might want to talk to your Dr. about this. He says the cuts are small nowadays. They are learning more and more about doing this.
I had PT for a long time and it didn't help.
Ada