 Several pathologies have been documented in the Gorgosaurus libratus holotype , NMC 2120 . These include the third right dorsal rib , as well as healed fractures on the 13th and 14th gastralia and left fibula . Its fourth left metatarsal bore roughened exostoses both in the middle and at the far end . The third phalanx of the third right toe is deformed , as the claw on that digit has been described as " quite small and amorphous " . The three pathologies may have been received in a single encounter with another dinosaur . 
