It's possible that Chael meant this figuratively. No one's thrown that out there yet. Reading the quote I really didn't get the vibe that he was trying to make a medical diagnosis so much as he was trying to say that Lance Armstrong's a shitty individual. I don't have an opinion on Armstrong, just saying.
Anyway Sonnen is crazy as hell and damn good at getting attention. To me this kind of off the wall shit will just make it that much more epic if Chael can get the win.