This reminds me of the spoof someone did where they circulated (faked) rumors of Jobs having a heart attack a few years... Cut Apple's stock price by something like 66%. It wouldn't surprise me if some unscrupulous investors would try something like that, circulating fake news to make a quick few million bucks by short-selling Apple's stock. Doing that would be flagrantly illegal, yes, (if caught, they'd be fighting Bernie Madoff for the top bunk) but that hasn't stopped investors before, now has it?
My opinion is that he's probably fine. If he actually DID go to a cancer center, chances are it was something like an "early catch with 100% chance of survival," since those like him have the resources and know-how to go get themselves checked regularly. All told, it might be something like a tiny patch of skin cancer (save for Melanoma, it's never life-threatening if caught early) possibly caused due to radiation exposure from his reality distortion field.
[citation][nom]Jane McEntegart[/nom](we’ll pause while you swallow the whole salt-lick)[/citation]
Kudos to you for demonstrating you're aware of the potentially dubious nature here. Too many (even respectable mainstream) news sites probably are parroting it without realizing the primary source is a tabloid.