Dror Shir, Nick Corriveau-Lecavalier, Camilo Bermudez Noguera, Leland Barnard, Nha Trang Thu Pham, Hugo Botha, Joseph R Duffy, Heather M Clark, Rene L Utianski, David S Knopman, Ronald C Petersen, Bradley F Boeve, Melissa E Murray, Aivi T Nguyen, R Ross Reichard, Dennis W Dickson, Gregory S Day, Walter K Kremers, Neill R Graff-Radford, David T Jones, Mary M Machulda, Julie A Fields, Jennifer L Whitwell, Keith A Josephs, Jonathan Graff-Radford
BACKGROUND: Primary progressive aphasia (PPA) defines a group of neurodegenerative disorders characterised by language decline. Three PPA variants correlate with distinct underlying pathologies: semantic variant PPA (svPPA) with transactive response DNA-binding protein of 43 kD (TDP-43) proteinopathy, agrammatic variant PPA (agPPA) with tau deposition and logopenic variant PPA (lvPPA) with Alzheimer's disease (AD). Our objectives were to differentiate PPA variants using clinical and neuroimaging features, assess progression and evaluate structural MRI and a novel 18-F fluorodeoxyglucose positron emission tomography (FDG-PET) image decomposition machine learning algorithm for neuropathology prediction...
March 21, 2024: Journal of Neurology, Neurosurgery, and Psychiatry