sentences:  Original reports of this broken bone were contradicted by the CT scans which showed no fracture.Multiple holes in the front of the skull were originally thought to be either from a bacterial infection or bite marks by some other tyrannosaur.A subsequent study found these to be areas of parasitic infection instead, possibly from an infestation of an ancestral form of "Trichomonas gallinae", a protozoan parasite that infests birds and ultimately leads to death by starvation due to internal swelling of the neck.