Good day, @dfelix I am Scott and it is nice to e-meet you here. I am sorry for the travails your sister is undergoing. I send peace, strength, and courage. My wife fought GBM for 14 years. After her diagnosis her tumor remained slow growing, then it suddenly accelerated. Due to the location and other considerations the only intervention she chose was an early resection. Even when her tumor got more aggressive at Stage IV she chose home hospice as her option. She defied the doctors' best guesses of 6 months or less and won her war for 14 months. Unfortunately I have no advice on newer technologies, but I am sure they are legion! I know Dr. Daniel Lachance at Mayo Rochester has been involved in some truly phenomenal research on DNA fighting approaches to brain cancer.

I was her 24/7 caregiver during her war so if you have any caregiving questions feel free to ask.

Peace!