Episode Details

CTE, the brain disease tied to repeated head trauma from sports, military service, and more, remains a mystery—no clear threshold of hits causes it, and diagnosing it in living people is nearly impossible without ruling out tumors, Alzheimer’s, and other conditions, often taking a year or more. With no definitive test yet, scientists are racing to understand why some develop CTE while others don’t, even with similar exposure. Researchers are exploring blood and spinal fluid biomarkers, but nothing’s reliable yet. Next year, experts will convene at the NIH to tackle this urgent challenge: finding ways to diagnose CTE sooner and more accurately while people are still alive.

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