My mother has stage 4 oral cancer. She was recently diagnosed with a tumor on the front side of her tongue. Surgery was recommend as the best option.

She is very frail and opted not to have the surgery or chemo or radiation. She is currently dealing with her pain with Advil. She has a prescription for Oxicoton but is worried about taking it. She has a good appetite and Is eating soft foods.

I am looking for the resources to learn how this cancer will spread and gain as much information as possible to help her stay comfortable. I know that at some point she will need to move to Pallative care.

Please provide any resources or point me in the right direction. Many Thanks