Dear Vince,
My heart goes out to you.
It is a major operation, but one that can possibly lengthen your mother's life.
My husband had the same procedure, only because we could not safely biopsy the lesion. His was benign, but there was no way to know that until the surgeon had taken out the top 1\3 of the right lung.
If she is not showing any other tumors, please, in my uneducated (until recently) opinion, let her have the surgery. If she is able to safely endure the surgery, I think she has a chance of more quality time.
I want you to know that I'm not an expert. Only someone who has gone through the same procedure. It is hard, but if it puts the cancer in remission, it's worth considering.
Please email me if you would like to hear more of our experience.
Mandi