Veteran US senator John McCain diagnosed with brain cancer
McCain is reviewing treatment options, which could include chemotherapy and radiation.
The tumour was detected last week during a surgery to remove a blood clot from just above his left eye.
His doctors said he's recovering very well from his surgery.
John McCain diagnosed with brain cancer
Who is John McCain?
McCain is a six-term senator and the 2008 Republican presidential candidate.
He was a US Navy pilot, shot down over Vietnam and held for over five years as a prisoner of war. McCain has a reputation for being a tough, independent-minded maverick of a senator and a senior authority in national security issues. He has forcefully argued in favor of US' military might.
McCain's doctors said tissue analysis revealed that he's suffering from glioblastoma, a particularly aggressive brain tumour. The tumour's frequency increases with age and affects more men than women.
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McCain's daughter Meghan, 32, said his family reacted with "shock" over the news.
She tweeted: "the one of us who is most confident and calm is my father."
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US President Donald Trump, who previously criticized McCain, said that the McCain has "always been a fighter" and wished him: "Get well soon."
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