High Quality Content by WIKIPEDIA articles! Chronic traumatic encephalopathy (CTE) is a progressive degenerative disease, diagnosed post-mortem in individuals with a history of multiple concussions and other forms of head injury. A variant of the condition, dementia pugilistica (DP), is primarily associated with boxing. CTE has been most commonly found in professional athletes participating in American football, ice hockey, professional wrestling and other contact sports who have experienced head trauma. It has also been found in soldiers exposed to a blast or a concussive injury, in both cases resulting in characteristic degeneration of brain tissue and the accumulation of tau protein. Individuals with CTE may show symptoms of dementia, such as memory loss, aggression, confusion and depression, which may appear within months of the trauma or many decades later.