I am so sorry to hear of your situation and bow to the experts who have already responded. "Too old" is a very hard thing to accept as a reason for no treatment (my own feeling is that no one is too old when it is your own family member being talked about).

What does your grandma want to do? Is she accepting of what the doctors are telling her or does she want treatment? If she wants treatment, maybe shrinking her tumour will make her more comfortable? I am quite new at this myself so please ask your doctor.

For 3-4 months before diagnosis, my Alex was in enough distress to take pain killers laced with codeine 3 or 4 times a day, every day. When he was finally diagnosed the tumour was 4cm (just under 2 inches). He felt better immediately after his first round of chemotherapy and realised about week 3 that he was not taking pain killers anymore. The chemo made him sick of course and this is something you and your grandma need to think about but we are now through 4 rounds of chemo and Alex has no pain and no visible tumour. The cancer is still there but it is so small the doctors can't see it anymore.

Everybody's cancer is different, and everybody reacts differently to treatment and the doctors may have excellent reasons for their opinion in your grandma's case, but if your grandma wants to treat, and it was me, I would get another opinion.

Good luck
KLo