The 80-year-old lawmaker underwent surgery to remove a blood clot from above his left eye last week and tests "revealed that a primary brain tumor known as a glioblastoma was associated with the blood clot," the Mayo Clinic said in a statement released by McCain's office. "The senator and his family are reviewing further treatment options," the statement added, noting they may include a combination of chemotherapy and radiation.

Source: The Nation Bangkok July 20, 2017 00:22 UTC