Glioblastoma
The most common length of survival following diagnosis is 12 to 15 months, with fewer than 3% to 5% of people surviving longer than five years. Without treatment survival is typically 3 months.
John McCain
McCain underwent a minimally invasive craniotomy at Mayo Clinic Hospital in Phoenix, Arizona, on July 14, 2017, in order to remove a blood clot above his left eye. His absence prompted Senate Majority Leader Mitch McConnell to delay a vote on the Better Care Reconciliation Act. Five days later, Mayo Clinic doctors announced that the laboratory results from the surgery confirmed the presence of a glioblastoma, which is a very aggressive brain tumor. Standard treatment options for this tumor include chemotherapy and radiation, although even with treatment, average survival time is approximately 14 months. McCain was a survivor of previous cancers, including melanoma.