Can Consciousness Be Regained While Suffering From End Stage Breast Cancer?

Dear Sir, Thank you very much for your allowing me to ask a question for your kind expert advice. I am Sajid Mahmood from Pakistan. My mother aged 75 years had breast cancer which later on spread in whole body. She gone through necessary stages of chemo injections. Now finally her doctor (Oncologist) has informed us that she cannot do any more treatment, and take her back home. My mother is partially unconcious since last five days. She can hear our voice but is unable to respond except nodding. Her diet is also reduced. Kindly advise regarding her brain treatment. thanks.