I have heard of the tumor/cyst for a few years. So, I can't say either way. It's hard for me to take it at face value because I don't believe his "heart issue" was the reason he left UF and I certainly don't believe he had a letter from his daughter that was the driving force behind him coming back to college football.
There's no doubt he was on his knees during that game and by all accounts he looked like he was having some issues. But, he's today's defined "boy that cried wolf."