My 79 year old mum has stage 4 lung cancer

My 79 year old mum was diagnosed with stage 4 lung cancer last August. The cancer did not spread and the liquids that were in the canals originally have gone. Her tumor is growing a little bit but not significantly. She was on two different chemos and then they put her on a chemo pill last month that caused a lot of outbreak and irritation in her hands and face. Her hands hurt so much that the doctor took her off it two weeks ago. He said the only option now is another chemo pill that he says would give her severe side effects. He said she would lose all her hair and the outbreaks would be more severe. He said she would be miserable. I was hoping that the last chemo pill would help but the tumor grew a little but he said it wasn't significant of a growth. I also asked my sister why if there were no fluids and the cancer hasnt spread why they cant remove the lung that has the tumor. My sister said they asked the doctor in the beginning and he said the surgery would probably kill her at her age which is 79. All this time, since she was diagnosed last August, she has never gotten a second opinon. She likes her doctor and he confers with other oncologists at Maine Medical in Portland, Maine. He also told her he confers with oncologists in Boston. I still wish she would go see someone else.

Do any of you or do any of you know someone in a similar situation? Any thoughts on the surgery and would it really kill her to have one lung removed?

Thank you.