A dinosaur was diagnosed with bone cancer in first confirmed case - Business Insider - Business Insider

Researchers have even found tumors in a duck-billed dinosaur, though they didn't confirm a cancer diagnosis. .

To confirm that the dinosaur had cancer, a team of researchers from an array of fields — including pathology, radiology, orthopaedic surgery, and paleopathology — x-rayed the bone and studied its cellular structure under a microscope

They also compared the bone to a normal calf bone from the same type of dinosaur, as well as to the amputated calf bone of a 19-year-old human man who'd suffered from the same cancer they suspected the dinosaur had. 

At the end of that two-year process, the results showed that the bone was indeed cancerous: The dinosaur was suffering from an aggressive form of osteosarcoma, a type of bone cancer usually diagnosed in young people

"It gives us unique insight into the lives of other dinosaurs," he said, adding, "it's sad to think this dinosaur had cancer, but at least it didn't kill him — at least he died surrounded by his friends."