In an interview with NBC morning show Tuesday, Douglas said: “I feel good, relieved. The tumour is gone.”
He added: “I think the odds are, with the tumour gone and what I know about this particular type of cancer, that I’ve got it beat.”
Douglas, 66, said he still had to be monitored on a monthly basis.
“I guess there’s not a total euphoria. I’ll probably take a couple of months of getting checked out but it’s been a wild six-month ride,” Douglas said in the recorded interview which will be aired in full on 23 January.
Douglas told Today co-host Matt Lauer he had been “eating like a pig” since he finished his radiation treatment and had been working out at the gym.
The Oscar-winning actor said he had lost 32lbs during his cancer treatment but had since put 12lbs back on.
Douglas revealed in August 2010 that he had advanced “stage four cancer”.
He was last seen on the big screen in Wall Street: Money Never Sleeps in the autumn.
The actor, the son of film legend Kirk Douglas, won an Oscar for his role as ruthless stockbroker Gordon Gekko in the original Wall Street film.
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