I'm asking on behalf of my sister. She is 61 years old. She had breast cancer treatment in 2012, a mastectomy. 2018 she as diagnosed with still disease. She has other pre existing conditions, high blood Pressure, diabetes, thybroids and lupus. She has now been diagnosed with bone cancer. The hospital doctor says they can't treat the cancer because if her other conditions. She wants to fight this. Is there a realistic chance her cancer can be treated to extend her life. I've heard the proton beam is very successful.