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Home NEWS Science News

Tumor found in a 255-million-year-old mammalian ancestor

Bioengineer by Bioengineer
December 8, 2016
in Science News
Reading Time: 1 min read
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A tumor in a 255-million-year-old mammalian ancestor called a gorgonopsian is detailed in a new research letter published online by JAMA Oncology.

The research letter by Megan R. Whitney, M.Sc., of the University of Washington, Seattle, and coauthors reports on a microscopic study of part of a gorgonopsian's jaw, which included examining wafer-thin slices of the specimen.

Ectopic toothlike structures that resembled miniature teeth were seen, an ancient condition that the authors suggest resembles compound odontoma, which is a common type of tumor although what causes it is not well understood. In humans, compound odontoma is characterized by miniature teeth that can cause the resorption of the functional tooth.

Odontomas were previously unknown in deep premammalian evolutionary history, according to the article.

"Recognition of odontoma in such a distant relative of humans suggests that this condition is unlikely related to characteristics of mammalian dentition [teeth] or physiologic features but rather evolved much earlier in vertebrate evolution," the report conclude.

###

For more details and the study findings, please visit the For The Media website.

(JAMA Oncol. Published online December 8, 2016. doi:10.1001/jamaoncol.2016.5417; available pre-embargo at the For The Media website.)

Editor's Note: The article contains funding/support disclosures. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.

Media Contact

James Urton
[email protected]
206-543-2580
@JAMA_current

http://www.jamamedia.org

############

Story Source: Materials provided by Scienmag

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