John McCain diagnosed with brain tumor - Chicago Tribune

John McCain diagnosed with brain tumor - Chicago Tribune

The 80-year-old Republican has glioblastoma, an aggressive cancer, according to doctors at the Mayo Clinic in Phoenix. The senator and his family are reviewing further treatment, including a combination of chemotherapy and radiation.

"On Friday, July 14, Sen. John McCain underwent a procedure to remove a blood clot from above his left eye at Mayo Clinic Hospital in Phoenix. Subsequent tissue pathology revealed that a primary brain tumor known as a glioblastoma was associated with the blood clot," his office said in a statement.

About 20,000 people in the U.S. each year are diagnosed with a glioblastoma, a particularly aggressive type of brain tumor. The American Cancer Society puts the five-year survival rate for patients over 55 at about 4 percent.