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New York: For the first time, the brain disease chronic traumatic encephalopathy or CTE was confirmed as a unique disease by a consensus panel of expert neuropathologists which can be definitively diagnosed by neuropathological examination of brain tissue.

CTE has a pathognomonic signature in the brain, an advance that represents a milestone for CTE research, the experts noted.

CTE is a progressive degenerative disease of the brain found in persons with a history of repetitive brain trauma, including symptomatic concussions as well as asymptomatic subconcussive hits to the head.

The trauma triggers progressive degeneration of the brain tissue, including the build-up of an abnormal protein called tau.

These changes in the brain can begin in months, years or even decades after the last brain trauma or end of active athletic involvement.

The brain degeneration is associated with memory loss, confusion, impaired judgment, impulse control problems, aggression, depression, and, eventually, progressive dementia.

A consensus panel of seven neuropathologists independently reviewed slides from 25 cases of different diseases associated with tau deposits in the brain using provisional diagnostic criteria for CTE developed by Ann McKee from Boston University in the US.

The neuropathologists concluded that the criteria distinguished CTE from other tauopathies, including aging and Alzheimer’s disease, and that CTE had a unique pathological signature in the brain.

According to McKee, neuropathologists agreed on the diagnosis of CTE and confirmed the interim standards.

“The specific feature considered unique to CTE was the abnormal perivascular accumulation of tau in neurons, astrocytes, and cell processes in an irregular pattern at the depths of the cortical sulci,” explained McKee who is the corresponding author of the study. The study appeared in the journal Acta Neuropathological. (IANS)



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