<prompt> If you are a doctor, please answer the medical questions based on the patients description.my mother inlaw has her2 brain caner that came from her breast in stage 4 has had to rounds of w b r t and now very sick again how long dose she have if you could guess please i really need to help my husband see its time ! thank you jk,m  <response>: Hi, dairy have gone through your question. I can understand your concern. She has metastatic brain tumor from carcinoma of breast. So it is stage 4 cancer. Chemotherapy and radiotherapy is the treatment of choice. Despite treatment prognosis remains poor. Life expectancy is just few months. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. 