Brain injury followed by dementia, now basal cell carcinoma on face

Hi there, my name is Loree and I am hoping someone can help my family with the latest of tragedies regarding my mom. The resident doctor at her long term care facility finally prescribed chemotherapy cream which did not have any real effect other than scabbing. New growth has developed and the patch has grown. Because of her brain injury (a fall), followed by what they call dementia (no tests ever done) the doctor will not refer her for further treatment. In his words she will die from dementia before the skin cancer kills her. So sad and upsetting, there must be something that can be done!! Any information would be so appreciate -