Median survival for a person with aggressive glioblastoma is 14.6 months, according to the American Brain Tumor Association. Approximately 30 percent of patients survive for 2 years, and a 2009 study suggested 10 percent reach 5-year survival.
Life expectancy for cancer patients is measured as 5-year survival rate, notes American Cancer Society. Patients with glioblastoma cancer aged 20 to 44 have a 17 percent survival rate, while patients 45 to 54 have a 6 percent survival rate at 5 years. Patients aged 55 to 64 have a 5-year survival rate of 4 percent. It is important to note that survival rates are approximations or rough estimates. Many things can affect a cancer patient's life expectancy. The stage of cancer, whether the cancer is operable and the overall health of the patient are all important factors.