Sen. John McCain diagnosed with brain cancer, tumor surgically removed

Sen. John McCain, 80, has been diagnosed with a primary glioblastoma, a type of brain tumor.

Mayo Clinic doctors directly involved in the senator's care told CNN that the senator underwent surgery to remove a blood clot on Friday at Mayo Clinic Hospital in Phoenix.

The Lab results from that surgery confirmed the presence of glioblastoma associated with the blood clot.

The surgery lasted about three to four hours and post-surgical brain scans show the concerned tissue has been completely removed.

McCain is now recovering at his Arizona home. He and his family are considering treatment options, which will likely include radiation and chemotherapy.

According to a statement from his office, McCain is recovering "amazingly well."

His doctors have assured that the senator showed no neurological problems before or after the operation.

McCain's daughter, Meghan McCain, responded to the news in a statement.

"The news of my father's illness has affected every one of us in the McCain family. My grandmother, mother, brothers, sisters and I have all endured the shock of the news, and now we live with the anxiety about what comes next," she said. "It won't surprise you to learn that in all this, the one of us who is most confident and calm is my father. He is the toughest person I know.