SaveSave story

Brain disease seen in 110 of 111 former NFL players studied

In a study of the brains of 111 deceased former NFL players who had concussion-related problems, 110 had signs of neurodegenerative disease found in autopsy. The new study – the largest of its kind to date — is certain to fuel new rounds of questions about concussions for the NFL and the league's players.

What they found: Researchers examined the brains of 202 former football players (ranging from a handful of high school players to more than 100 former NFL players) who donated their brains for research after they'd developed concussion-related symptoms during their lives. From this group, autopsy showed that 87% showed signs of chronic traumatic encephalopathy (CTE), which is the neurodegenerative disease normally associated with the type of head trauma players experience following repeated concussions. Among former NFL players included in the study, however, that number rose to 99% being diagnosed post-mortem.