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International Business Times UK
International Business Times UK
Michael Toledo

What Is Chronic Traumatic Encephalopathy? Symptoms, Causes and Cure Explained After Marshawn Kneeland's Diagnosis

Former Dallas Cowboys defensive end Marshawn Kneeland (Credit: Instagram/Marshawn Kneeland)

The posthumous diagnosis of former Dallas Cowboys defensive end Marshawn Kneeland with Stage 1 chronic traumatic encephalopathy (CTE) has renewed interest in one of sport's most widely discussed brain diseases.

Boston University's CTE Center confirmed the diagnosis after Kneeland's family donated his brain for research following his death in November 2025 at the age of 24.

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