What is chronic traumatic encephalopathy?

Published On: May 06 2012 04:48:36 PM PDT   Updated On: Nov 25 2015 01:21:07 PM PST

With Frank Gifford's family saying the football commentator and NFL great suffered from chronic traumatic encephalopathy before his August death, find out more about the progressive brain disease.

Stem cell research
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Researchers say CTE has a clear environmental cause (repeated brain trauma) rather than a genetic cause. In other words, CTE is the only preventable form of dementia.


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