Risks- besides the general risks associated with any surgery-

There is a risk of excess scar tissue developing in the area after these surgeries. Which can further impinge on the structures over time.
Some patients develop this and some do not. I don't think there is any way to predict this - unless you had other surgeries and developed excess scar tissue then.

Reading on the forum here you may notice that some have RSD with their TOS - some have it before surgery and some got it after a surgery {any surgery or even a minor injury can set off RSD- no specific cause or reason proved yet}

I feel these are things to be aware of and I wouldn't feel right if I didn't mention it.

We usually suggest getting at least one other surgical opinion and getting the best and most experienced surgeon that you can find.