Horned dinosaur Centrosaurus apertus shin bone (fibula) with malignant bone cancer (osteosarcoma) (image) Royal Ontario Museum Share Print E-Mail Caption The main tumour mass is at the top of the bone, and can be seen on the 3D reconstruction in yellow; red gray is the normal bone and red denotes the medullary cavity Credit Credit: Centrosaurus diagram by Danielle Dufault. Courtesy of Royal Ontario Museum. © Royal Ontario Museum/McMaster University Usage Restrictions Image use for this story only. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.