<human>: Can you provide a brief overview of the text?

My 17 y/o cat was diagnosed yesterday with bone cancer in her jaw. It seems to be isolated at this point, though there isn't any way to be completely sure of course. Vet gave me the option of surgery to remove the part of her jaw with the tumor. But given her age, there are the associated concerns of surgery, recovery, and such. Additionally, she is diabetic. Though I have had her in remission for 3 or 4 years now and she doesn't require insulin. Right now, she is doing quite well, eating good, and is not appearing to be in pain (I'm aware cats hide pain very well). Even the vet commented on how well she is overall.  So, I guess I just want to hear people's thoughts. Do I put her through the trauma of surgery with the associated risks so that I can try to give her more time - hopefully healthy and happy?  Or do I let her be happy now, manage pain when it needs it, and let her go when her quality of life starts to deteriorate?  I really just want to do the best by her. If she were younger, it would be easier to just do the surgery. But given her age I am struggling to decide if the benefit to her is enough to put her through it.  But it also breaks my heart to do nothing. Any thoughts or experience with something similar with an older fur-baby?
<bot>: Old cat has cancer. Not in pain. Surgery with the risks and pain that go with it? Or keep her comfortable until it is time to let her go?