What is chronic traumatic encephalopathy?

POSTED: 04:48 PM PDT May 06, 2012    UPDATED: 12:43 PM PDT Apr 27, 2016 

Here is an explainer about CTE -- the progressive brain disease that is at the center of a debate between retired athletes and multiple sports leagues.

Chris Benoit
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Wikimedia Commons

In 2007, WWE wrestler Chris Benoit had his brain examined after he killed his wife and son before committing suicide. Originally the tragedy was thought to be due to the abuse of anabolic steroids. However, a brain biopsy identified pathognomonic brain tissue changes of CTE.

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