CTE found in 99% of former, deceased NFL players’ brains: JAMA study (updated)

[grow_thumb image=”https://telecareaware.com/wp-content/uploads/2017/07/h_research_Figure-4.-Annotated-Normal.-Mild-CTE.-Severe-CTE.jpg” thumb_width=”200″ /]Updated for additional information and analysis at conclusion. In the largest-ever case study published of CTE–chronic traumatic encephalopathyVA Boston Healthcare System (VABHS) and the Boston University School of Medicine’s CTE Center found mild to severe CTE pathology in nearly all of the brains of former football players studied. Jesse Mez, MD, BU Medical assistant professor of neurology and lead author on the JAMA study, said that “The data suggest that there is very likely a relationship between exposure to football and risk of developing [CTE].” The CTE is marked by defective tau (stained red in the brain sample pictures, click to expand), which is also evident in Parkinson’s and Alzheimer’s Disease.

Of the 202 brains donated to the VA-BU-CLF (Concussion Legacy Foundation) Brain Bank:

  • The most dramatic finding is the detection of CTE in 110 of 111 donated former NFL players’ brains (defined as having played one play in a regular NFL season game).
  • In addition, the brains of other football players were studied. CTE was detected in seven of eight Canadian Football League former players (88 percent), nine of 14 semi-professional players (64 percent), 48 of 53 college players (91 percent), and three of 14 high school players (21 percent).
  • The severity increased with length of play, with the majority of former college, semi-professional and professional players having severe pathology. The deceased high school players diagnosed with CTE had mild pathology findings. Age at death ranged from 23 to 89.
  • Player position mattered. Linemen, running backs, defensive backs, and linebackers, who take most of the punishment in football, were the bulk of the donated brains with CTE.

Separately, and with no knowledge of the pathology, backgrounds on each donor were compiled to gather medical history and symptoms. What was striking were the personality changes evident with even mild CTE. Dr. Mez: “We found cognitive, mood and behavioral symptoms were very common, even among players with mild CTE tau pathology. This suggests that tau pathology is only the tip of the iceberg and that other pathologies, such as neuroinflammation and axonal damage, contribute to the clinical symptoms.” 

Preliminary to the current study was UNITE (more…)