Maria - I would like to echo what Christine has said about getting a second opinion. Radiation can be really difficult for some, even those much younger than your mother. My son, at age 33, had such a hard time, that the doctors gave him a 3-day break during the Rad treatment two times so that he could recuperate a little before continuing on. The closer he got to the end of Tx, the more he wanted to finish it. Everyone reacts differently of course. Many have a much easier time than others. I think all you can do is to help your Mom with all the information that you can gather and then leave the decision up to her. She will feel more in control of her own life if she can be the one to decide, knowing that you will support her whatever her decision is.