Please help with advice about brain cancer!

This is very sad and I understand that you want to help your sister. The cancer that you describe is very aggressive.
Maybe, with your sisters permission you could accompany her on the next consultants appointment to explore how you can further help her and her family.
Just a friendly word of warning, this is a public forum and your post details confidential medical information of her results and medications plus you appear to have given your full name. I wish you well.

So sorry to hear about your sister. I don't have any advice, I'm afraid. Best wishes.

Contact someone at the hospital for Neurology and Neurosurgery at Queen Square, London.

Leonid you would probably be better off looking at cancer charity or NHS websites; good luck anyway.

Sadly I am not an oncologist.
I hope your sister gets all the help she can.