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May 03, 2016; 86 (18) ArticleOpen Access

Prevalence, characteristics, and survival of frontotemporal lobar degeneration syndromes

Ian T.S. Coyle-Gilchrist, Katrina M. Dick, Karalyn Patterson, Patricia Vázquez Rodríquez, Eileen Wehmann, Alicia Wilcox, Claire J. Lansdall, Kate E. Dawson, Julie Wiggins, Simon Mead, Carol Brayne, James B. Rowe
First published April 1, 2016, DOI: https://doi.org/10.1212/WNL.0000000000002638
Ian T.S. Coyle-Gilchrist
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Katrina M. Dick
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Karalyn Patterson
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Patricia Vázquez Rodríquez
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Eileen Wehmann
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Alicia Wilcox
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Claire J. Lansdall
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Kate E. Dawson
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Julie Wiggins
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Simon Mead
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Carol Brayne
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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James B. Rowe
From the Department of Clinical Neurosciences (I.T.S.C.-G., K.P., P.V.R., A.W., C.J.L., K.E.D., J.W., J.B.R.) and Cambridge Institute of Public Health (C.B.), University of Cambridge; Dementia Research Centre (K.M.D.) and MRC Prion Unit and Department of Neurodegenerative Disease (S.M.), University College London, UK; and University Medical Center Eppendorf (E.W.), University Hamburg, Germany.
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Citation
Prevalence, characteristics, and survival of frontotemporal lobar degeneration syndromes
Ian T.S. Coyle-Gilchrist, Katrina M. Dick, Karalyn Patterson, Patricia Vázquez Rodríquez, Eileen Wehmann, Alicia Wilcox, Claire J. Lansdall, Kate E. Dawson, Julie Wiggins, Simon Mead, Carol Brayne, James B. Rowe
Neurology May 2016, 86 (18) 1736-1743; DOI: 10.1212/WNL.0000000000002638

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Abstract

Objectives: To estimate the lifetime risk, prevalence, incidence, and mortality of the principal clinical syndromes associated with frontotemporal lobar degeneration (FTLD) using revised diagnostic criteria and including intermediate clinical phenotypes.

Methods: Multisource referral over 2 years to identify all diagnosed or suspected cases of frontotemporal dementia (FTD), progressive supranuclear palsy (PSP), or corticobasal syndrome (CBS) in 2 UK counties (population 1.69 million). Diagnostic confirmation used current consensus diagnostic criteria after interview and reexamination. Results were adjusted to the 2013 European standard population.

Results: The prevalence of FTD, PSP, and CBS was 10.8/100,000. The incidence and mortality were very similar, at 1.61/100,000 and 1.56/100,000 person-years, respectively. The estimated lifetime risk is 1 in 742. Survival following diagnosis varied widely: from PSP 2.9 years to semantic variant FTD 9.1 years. Age-adjusted prevalence peaked between 65 and 69 years at 42.6/100,000: the age-adjusted prevalence for persons older than 65 years is double the prevalence for those between 40 and 64 years. Fifteen percent of those screened had a relevant genetic mutation.

Conclusions: Key features of this study include the revised diagnostic criteria with improved specificity and sensitivity, an unrestricted age range, and simultaneous assessment of multiple FTLD syndromes. The prevalence of FTD, PSP, and CBS increases beyond 65 years, with frequent genetic causes. The time from onset to diagnosis and from diagnosis to death varies widely among syndromes, emphasizing the challenge and importance of accurate and timely diagnosis. A high index of suspicion for FTLD syndromes is required by clinicians, even for older patients.

GLOSSARY

bvFTD=
behavioral variant frontotemporal dementia;
CBS=
corticobasal syndrome;
ESP2013=
European Standard Population 2013;
FTD=
frontotemporal dementia;
FTLD=
frontotemporal lobar degeneration;
MND=
motor neuron disease;
nfvPPA=
nonfluent agrammatic variant primary progressive aphasia;
PiPPIN=
Pick's Disease and Progressive Supranuclear Palsy: Prevalence and Incidence;
PPA=
primary progressive aphasia;
PSP=
progressive supranuclear palsy;
svPPA=
semantic variant primary progressive aphasia

Footnotes

  • Go to Neurology.org for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article. The Article Processing Charge was paid by Wellcome Trust.

  • Supplemental data at Neurology.org

  • Received September 29, 2015.
  • Accepted in final form January 21, 2016.
  • © 2016 American Academy of Neurology

This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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