US Republican Senator John McCain has chosen to discontinue medical treatment for an aggressive form of brain cancer, his family said on Friday. The statement comes a year after the Vietnam War hero announced his prognosis. “John has surpassed expectations for his survival,” the family said. The disease’s progression and McCain’s age, 81, has led him to stop treatment for the “aggressive glioblastoma,” Reuters reported, citing the statement. “With his usual strength of will, he has now chosen to discontinue medical treatment,” it added.