“Researchers over at the Museum of Natural History, Leibniz Institute for Research on Evolution and Biodiversity in Berlin, Germany imaged the fossilized left femur of the shell-less turtle, called Pappochelys rosinae. The bone had been discovered in southwestern Germany in 2013.
A co-author Dr. Bruce Rothschild said, “what it looked like was a malignant periosteal osteosarcoma, a type of bone cancer.. This type of cancer has been previously reported in a Triassic amphibian, but this is likely the oldest instance found in an Triassic amniote.”
Saplakoglu, Yasemin. 2019, 'Oldest' Case of Bone Cancer Is Diagnosed in a 240-Million-Year-Old Shell-Less Turtle. Live Science (7 February).