The Central Brain Tumor Registry of the USA publishes this report every year. The Musella Foundation is a proud sponsor of it! This 100 page report has the most trusted statistics on brain tumors.
Unfortunately, it shows that in the USA, the median survival for Glioblastoma is still stuck at just 8 months. We always hear the survival for Glioblastoma is 18 -24 months, but that is from clinical trials, and only about 8% of adult GBM patients participate in clinical trials.