I have. My father’s sister lived just over 5 years after being diagnosed with oglioma. At the end, she died a horrible death that I would not wish on anyone. I do remember one experimental treatment involving her wearing a helmet while in a hospital room for several days and nobody could be within a certain distance to her. It didn’t help her for long.
My Dad died in May 1988 only 2 months after being diagnosed.
Neurosurgeon said with radiation treatment he would have a year.
Apparently, he lied through his teeth, because Dad went downhill fast in spite of treatment, and we couldn’t even get the neurosurgeon on the phone.