Theakston said his diagnosis was an “enormous shock” after initially thinking it was just a “sore throat”.
“And when I was told, ‘Oh, it’s probably cancer’, just, literally, I just didn’t even know what to say. I mean, it just blew my mind,” he said.
The presenter previously shared that his cancer was identified by a biopsy and the prognosis was “very positive”.
Speaking on Friday’s show, he said: “So, the first surgery wasn’t as successful as we hoped. Had a second surgery, and then a third surgery, and each time, I was doing more and more damage to my vocal cords.
“So, in actual fact, by the third one, they said, ‘Well, look, you’ve got a one-in-six chance you might not be able to talk again’. And so, then you kind of think, ‘Oh, OK, that’s like rolling a dice’, yeah, I’ll take that.”