US Senator John McCain diagnosed with a brain tumour

US Senator John McCain has been diagnosed with a brain tumour, his office has said.

The Arizona politician had a blood clot removed from above his left eye last Friday and tissue analysis since the procedure revealed a brain tumour, known as glioblastoma, was associated with the clot.

His doctors said the 80-year-old is reviewing treatment options that may include a combination of chemotherapy and radiation.

They added he is recovering from his surgery "amazingly well" at home and that his underlying health is "excellent".