A group of scientists diagnosed advanced cancer in a dinosaur that lived more than 75 million years ago. The Centrosaurus suffered from a bone cancer that also afflicts humans. The researchers from the Royal Ontario Museum (ROM) and McMaster University used high-resolution medical imaging and microscopy to analyze cells from a bone. While the cancer was advanced, the scientists believe that the location of the fossils indicate it was killed by a flood rather than the disease. From the journal Science:
Paleontologists initially thought the bone's strange shape was due to a fracture that hadn't healed cleanly. But a new study, published today in The Lancet Oncology, compares the internal structure of the fossil (above) with a bone tumor from a human patient to seek a diagnosis. The conclusion: The dinosaur suffered from osteosarcoma, a cancer that, in humans, primarily attacks teens and young adults. The disease causes tumors of immature bone tissue, frequently in the long bones of the leg.
More: "Rare Malignant Cancer Diagnosed in a Dinosaur" (Royal Ontario Museum)