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id="article-body" class="row" section="article-body" data-component="trackCWV"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>This fossil bone from a Centrosaurus apertus led to a bone cancer diagnosis.<br><br>Danielle Dufault, Royal Ontario Museum<br><br><br><br><br><br>Osteosarcoma is an aggressive bone cancer that occurs in humans,  [https://Www.quora.com/profile/Pacific-Integrative-Oncology oncology journal] mostly children and young adults. It also afflicted a horned dinosaur 76 million years ago. <br>A study led by researchers at [https://www.Brandsreviews.com/search?keyword=McMaster%20University McMaster University] and the Royal [https://www.business-opportunities.biz/?s=Ontario%20Museum Ontario Museum] in Canada has resulted in a surprising diagnosis of osteosarcoma in the fibula of a Centrosaurus apertus, a dinosaur that resembles the more familiar triceratops.<br><br><br><br><br>CNET Science <br><br><br><br><br>From the lab to your inbox. Get the latest science stories from CNET every week.<br><br><br><br><br><br><br>"No malignant cancers -- tumors that can spread throughout the body and have severe health implications -- have ever been documented in dinosaurs previously,"  on Monday. The team  this month.  <br><br>This shows the location of the bone in the dinosaur's leg and highlights the cancer tumor mass.<br><br>Centrosaurus diagram by Danielle Dufault. Courtesy of Royal Ontario Museum. Royal Ontario Museum/McMaster University<br><br>Scientists originally thought the leg bone's odd shape came from a healed break, but a much closer look revealed the truth. <br><br>"After carefully examining, documenting and casting the bone, the team performed high-resolution computed tomography (CT) scans. They then thin-sectioned the fossil bone and examined it under a microscope to assess it at the bone-cellular level," McMaster said.<br><br>The researchers also compared the bone with a known case of osteosarcoma in a human and with a normal Centrosaurus apertus leg bone. Though the dinosaur's cancer was advanced, it appeared to have died in a flood rather than from the illness. <br><br>"The fact that this plant-eating dinosaur lived in a large, protective herd may have allowed it to survive longer than it normally would have with such a devastating disease,"  of the Royal Ontario Museum.<br>