I am so sorry your mom is going thru this. I was diagnosed with colon cancer in 6/2004. I had surgery to remove tumor and 2 nodes were involved, so stage 3. I had chemo therapy and am cancer free at this time, which is one year from end of treatment. I knew of someone who had stage 1 colon cancer and no chemo. It came back a few years later and she died. My point is, should all colon cancer patients have chemo, no matter what the stage???? I do not know what they do for lung cancer (from colon). I would, however, get a couple of opinions.
I wish you and your mom luck. Don't give up. Keep fighting. Attitude is 90% of this awful disease. Barbara119