God bless you, that is a devastating loss. I have had two relatives and a good friend die of this terrible cancer and understand your pain. My beloved niece was under the care of Dr.Keith Black, a renowned neurosurgeon at Cedars-Sinai, she also had all the treatments available at the time and there was just no hope from the beginning. After two resections, she said enough.
My heart goes out to you. It’s a devestating diagnosis.
Watching what he went thru made me decide that given a similar diagnosis, I would never let Dr’s do that to me. The initial surgery did help relieve pain & symptoms, but the radiation & chemo were useless, expensive and made his remaining life miserable.