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Malignant Cancer, Which Can Spread All Over The Body Causing Severe Health Issues, Was For The First Time Diagnosed In A Dinosaur. The Aggressive Bone Cancer, An Osteosarcoma, Was Diagnosed In The Lower Leg Bone Of A Plant-Eating Dinosaur, The Centrosaurus Apertus. This Study May Broaden Our Understanding Of Dinosaur Afflicting Diseases.

New Research Shows Dinosaurs Suffered From Malignant Cancer, Too : NPR

https://www.npr.org/2020/08/04/899060875/scientists-discover-malignant-cancer-in-a-dinosaur

Scientists have identified an aggressive bone cancer — for the first time — in the fibula of a dinosaur that lived 76 to 77 million years ago. The diagnosis sheds new light on dinosaurs and disease.