My mom is 82. She was just diagnosed with a new cancer unknown primary. She has beat cancer (3) times already. She had breast cancer (once in each breast) the second time was Triple Negative. She tried chemo but stopped after one treatment it made her to sick. After the breast cancer she developed lung cancer (a very tiny tumor) despite being a non-smoker. She had surgery for the lung cancer and all was clear. She did do lumpectomy for both breast cancers and radiation therapy. This has all been since 2015.

She now has a 4.0 cm mass in her para-aortic region. The lymph node/tumor was biopsied and came back as Cancer with unknown primary diagnosis. They suspect metastasis from either the ovary, kidney or peritoneal.
She refuses to do chemotherapy at her age and she has stage 3 kidney disease as well. The oncologist has said it is probably stage 3 or 4. The cancer was poorly differentiated which I understand to be a bad thing. It is better to be well differentiated (please correct me if I'm wrong). Does anyone know how fast these things grow. It is impossible to understand how we are supposed to live with this. Since chemotherapy was the only available option and she declined we don't know if that means she will live 6 months or a few years. The recommendation was to do another scan in a few months to see how things are. She is asymptomatic as of now except for being easily tired and her appetite is not great. She has anemia so we don't know it's the cancer or anemia making her tired.
I'm sorry for writing a book here but I' super frustrated and worried. I'm not ready to lose my mom yet.