What Is the Longest Anyone Has Lived With a GBM Brain Tumor?

As of 2015, at least one person has lived 15 years after being diagnosed with a glioblastoma multiforme, an aggressive brain cancer, states Mayfield Clinic for Brain and Spine. Approximately 3 to 5 percent of glioblastoma patients survive long-term. Most patients typically die within one to two years after diagnosis.