S+s of end stage primary brain cancer, (aa iii) r medial temporal lobe, diffuse numerous cells. growing!/brainstem and posterior temp./basal ganglia?

What is the question: You may want to be more specific about your question. It is always the best advice to discuss everything in detail and in person with your doctor. Not only you would much better understanding about everything but also you have all the opportunities to ask as many questions you have.

Ask for more info: Signs and symptoms can vary greatly with any 'end-stage' cancer. Things like if it has spread to other organs, impacting functional status and alertness (sleeping more, in bed most of the time), causing pain/seizures, and so on. His doctors can maybe determine what is most likely. If not involved already ask for hospice or palliative care help as they could also help answer what the s/s might be.