{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T02:31:36Z","timestamp":1790303496669,"version":"4.1.0"},"reference-count":101,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2020,5,21]],"date-time":"2020-05-21T00:00:00Z","timestamp":1590019200000},"content-version":"vor","delay-in-days":20,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Holt Fellowship"},{"DOI":"10.13039\/501100000286","name":"British Academy","doi-asserted-by":"publisher","award":["PF160048"],"award-info":[{"award-number":["PF160048"]}],"id":[{"id":"10.13039\/501100000286","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100010269","name":"Wellcome Trust","doi-asserted-by":"publisher","award":["103838"],"award-info":[{"award-number":["103838"]}],"id":[{"id":"10.13039\/100010269","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000265","name":"Medical Research Council","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000265","id-type":"DOI","asserted-by":"publisher"}]},{"name":"National Institute for Health Research Cambridge Biomedical Research Centre and Cambridge Brain Bank"},{"name":"Cambridge Centre for Parkinson Plus"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The syndromes caused by frontotemporal lobar degeneration have highly heterogeneous and overlapping clinical features. There has been great progress in the refinement of clinical diagnostic criteria in the past decade, but we propose that a better understanding of aetiology, pathophysiology and symptomatic treatments can arise from a transdiagnostic approach to clinical phenotype and brain morphometry. In a cross-sectional epidemiological study, we examined 310 patients with a syndrome likely to be caused by frontotemporal lobar degeneration, including behavioural variant frontotemporal dementia, non-fluent, and semantic variants of primary progressive aphasia (PPA), progressive supranuclear palsy and corticobasal syndrome. We included patients with logopenic PPA and those who met criteria for PPA but not a specific subtype. To date, 49 patients have a neuropathological diagnosis. A principal component analysis identified symptom dimensions that broadly recapitulated the core features of the main clinical syndromes. However, the subject-specific scores on these dimensions showed considerable overlap across the diagnostic groups. Sixty-two per cent of participants had phenotypic features that met the diagnostic criteria for more than one syndrome. Behavioural disturbance was prevalent in all groups. Forty-four per cent of patients with corticobasal syndrome had progressive supranuclear palsy-like features and 30% of patients with progressive supranuclear palsy had corticobasal syndrome-like features. Many patients with progressive supranuclear palsy and corticobasal syndrome had language impairments consistent with non-fluent variant PPA while patients with behavioural variant frontotemporal dementia often had semantic impairments. Using multivariate source-based morphometry on a subset of patients (n\u2009=\u2009133), we identified patterns of covarying brain atrophy that were represented across the diagnostic groups. Canonical correlation analysis of clinical and imaging components found three key brain-behaviour relationships, with a continuous spectrum across the cohort rather than discrete diagnostic entities. In the 46 patients with follow-up (mean 3.6 years) syndromic overlap increased with time. Together, these results show that syndromes associated with frontotemporal lobar degeneration do not form discrete mutually exclusive categories from their clinical features or structural brain changes, but instead exist in a multidimensional spectrum. Patients often manifest diagnostic features of multiple disorders while deficits in behaviour, movement and language domains are not confined to specific diagnostic groups. It is important to recognize individual differences in clinical phenotype, both for clinical management and to understand pathogenic mechanisms. We suggest that a transdiagnostic approach to the spectrum of frontotemporal lobar degeneration syndromes provides a useful framework with which to understand disease aetiology, progression, and heterogeneity and to target future treatments to a higher proportion of patients.<\/jats:p>","DOI":"10.1093\/brain\/awaa097","type":"journal-article","created":{"date-parts":[[2020,3,12]],"date-time":"2020-03-12T16:30:06Z","timestamp":1584030606000},"page":"1555-1571","source":"Crossref","is-referenced-by-count":158,"title":["Redefining the multidimensional clinical phenotypes of frontotemporal lobar degeneration syndromes"],"prefix":"10.1093","volume":"143","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0813-0670","authenticated-orcid":false,"given":"Alexander G","family":"Murley","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"},{"name":"Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ian","family":"Coyle-Gilchrist","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"},{"name":"Norfolk and Norwich NHS Foundation Trust, Norwich, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3157-4301","authenticated-orcid":false,"given":"Matthew A","family":"Rouse","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P Simon","family":"Jones","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Win","family":"Li","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julie","family":"Wiggins","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claire","family":"Lansdall","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patricia V\u00e1zquez","family":"Rodr\u00edguez","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alicia","family":"Wilcox","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3178-6363","authenticated-orcid":false,"given":"Kamen A","family":"Tsvetanov","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karalyn","family":"Patterson","sequence":"first","affiliation":[{"name":"Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK"},{"name":"MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5907-2488","authenticated-orcid":false,"given":"Matthew A","family":"Lambon Ralph","sequence":"first","affiliation":[{"name":"Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK"},{"name":"MRC Cognition and Brain Sciences Unit, University of Cambridge, Cambridge, 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