Compound odontoma found in ancient creature’s fossilized jaw

A benign tumor found in the jaw of an ancient relative of modern mammals is the oldest example of compound odontoma yet found, researchers say. The tumor, which is made of tiny tooth-like objects that grow in clusters in soft tissues of the jaw, would have been very painful for the gorgonopsian 255 million years ago, when it was roaming what is now Tanzania, according to findings published in JAMA Oncology.LiveScience.com (12/8)

 

We find odontomas common in prairie dogs. We also see it in guinea pigs and chinchillas.

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