RT Journal Article SR Electronic T1 National Institute of Neurological Disorders and Stroke Consensus Diagnostic Criteria for Traumatic Encephalopathy Syndrome JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 848 OP 863 DO 10.1212/WNL.0000000000011850 VO 96 IS 18 A1 Douglas I. Katz A1 Charles Bernick A1 David W. Dodick A1 Jesse Mez A1 Megan L. Mariani A1 Charles H. Adler A1 Michael L. Alosco A1 Laura J. Balcer A1 Sarah J. Banks A1 William B. Barr A1 David L. Brody A1 Robert C. Cantu A1 Kristen Dams-O'Connor A1 Yonas E. Geda A1 Barry D. Jordan A1 Thomas W. McAllister A1 Elaine R. Peskind A1 Ronald C. Petersen A1 Jennifer V. Wethe A1 Ross D. Zafonte A1 Éimear M. Foley A1 Debra J. Babcock A1 Walter J. Koroshetz A1 Yorghos Tripodis A1 Ann C. McKee A1 Martha E. Shenton A1 Jeffrey L. Cummings A1 Eric M. Reiman A1 Robert A. Stern YR 2021 UL http://n.neurology.org/content/96/18/848.abstract AB Objective To develop evidence-informed, expert consensus research diagnostic criteria for traumatic encephalopathy syndrome (TES), the clinical disorder associated with neuropathologically diagnosed chronic traumatic encephalopathy (CTE).Methods A panel of 20 expert clinician-scientists in neurology, neuropsychology, psychiatry, neurosurgery, and physical medicine and rehabilitation, from 11 academic institutions, participated in a modified Delphi procedure to achieve consensus, initiated at the First National Institute of Neurological Disorders and Stroke Consensus Workshop to Define the Diagnostic Criteria for TES, April, 2019. Before consensus, panelists reviewed evidence from all published cases of CTE with neuropathologic confirmation, and they examined the predictive validity data on clinical features in relation to CTE pathology from a large clinicopathologic study (n = 298).Results Consensus was achieved in 4 rounds of the Delphi procedure. Diagnosis of TES requires (1) substantial exposure to repetitive head impacts (RHIs) from contact sports, military service, or other causes; (2) core clinical features of cognitive impairment (in episodic memory and/or executive functioning) and/or neurobehavioral dysregulation; (3) a progressive course; and (4) that the clinical features are not fully accounted for by any other neurologic, psychiatric, or medical conditions. For those meeting criteria for TES, functional dependence is graded on 5 levels, ranging from independent to severe dementia. A provisional level of certainty for CTE pathology is determined based on specific RHI exposure thresholds, core clinical features, functional status, and additional supportive features, including delayed onset, motor signs, and psychiatric features.Conclusions New consensus diagnostic criteria for TES were developed with a primary goal of facilitating future CTE research. These criteria will be revised as updated clinical and pathologic information and in vivo biomarkers become available.bvFTD=behavioral variant frontotemporal dementia; CTE=chronic traumatic encephalopathy; DIAGNOSE CTE=Diagnostics, Imaging, and Genetics Network for the Objective Study and Evaluation of CTE; MBI=Mild behavioral impairment; NIBIB=National Institute of Biomedical Imaging and Bioengineering; NINDS=National Institute of Neurological Disorders and Stroke; PTSD=posttraumatic stress disorder; RHI=repetitive head impact; TBI=traumatic brain injury; TES=traumatic encephalopathy syndrome; UNITE=Understanding Neurologic Injury and Traumatic Encephalopathy