So it seems there was something to that whole X-ray story in the days before the game, even though the fractures were discovered first in an MRI after the game and not in that particular X-ray.
The PFT item deals with the injury reporting element, which, because the initial X-ray showed no damage, shouldn't be a big deal. The team doesn't have to report exams to the league and Ben didn't miss any practice.
I doubt it'll end up being something Roethlisberger is lionized for (not like "ZOMG Brady played with a fever over 100!" but it is remarkable nonetheless. The guy was playing as though nothing was wrong, clearly wasn't avoiding contact (scrambled on the final drive) and took about hisusual number of sacks. And yet still a stellar game. Tip o' the hat, Ben.