Pathologies have had the odd mention on here before (like here, here and here) and this one is rather minor as they go. It’s on the foot of the Tyrannosaurus specimen known as Jane. It’s pretty small, little more than a swelling and roughened bone on one of the pedal phalanges. Still, it suggests there was a fracture on infection at the site and this animal had clearly suffered some kind of injury in its young life. Hardly uncommon, but neat all the same.
Dave Hone's Archosaur Musings 
That is cool. Life was hard for these great beasts. I think it is on modern predators too sometimes.