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Stephen Fry is battling prostate cancer, he has revealed.

The 60-year-old revealed the news in a 12 minute video to YouTube, saying he has been fighting the disease for two months.

The British national treasure, who is a vocal advocate for LGBT rights, described the worrying health news as an “unexpected adventure”.

He said: “For the last two months I’ve been in the throes of a rather unwelcome and unexpected adventure.

“I’m sorry I haven’t felt able to talk about it till now, but here I am explaining what has been going on.”

Fry says he discovered the cancer during an MRI scan, as he praised his husband Elliot for supporting him through the process.

Stephen said: “Cancer is a word that rings in your head. “I’ve got cancer” I kept saying to myself, good heavens. You’re not supposed to get cancer.

“I know it’s a cliche but you don’t think it’s going to happen to you, cancer is something that happens to other people.”

He continued: “So far as we know, it’s all been got. Are there greater chances of me getting other cancers now? Apparently not. But I won’t know for sure until I get my PSA levels checked.

“They should be zero because I have no prostate, so the prostate specific antigen should be zero.

“But if there’s anything left on the bed of the prostate where they’ve taken it out, it may have spread and I’ll have to get radiotherapy and the whole damn thing will start again. But for the moment I’m fit and well and happy.”

The actor, author, comic and activist said that his doctors believed the early intervention had saved his life, and urged “men of a certain age” to get their PSA levels checked.

He said: ‘I’m bloody lucky to be surrounded by such wonderful people, and I’m lucky to have an immune system, which is the real hero.”