I am worried about my elderly mother who is above 75 years old. She is diagnosed with stage 3 invasive breast cancer.

Due to her other medical conditions and weakness surgery was not recommended, chemo was also said to have side effects which will cause her more harm than good and upon discussion it was decided that she should be left alone untreated.

I want to ask how long a person with untreated stage 3 invasive breast cancer lives. What can be done to ease her suffering and strengthen her immune system? People with similar experience please share your survival story thank you.