Fig. 1.

Clinical evaluation of PPA subtypes over time. svPPA Semantic variant primary progressive aphasia, bvFTD Behavioral variant frontotemporal dementia, nfvPPA non-fluent variant primary progressive aphasia, PPA-E Primary progressive aphasia-extended, CBS Corticobasal syndrome, PSP progressive supranuclear palsy, MND Motor neuron disease, lvPPA logopenic variant primary progressive aphasia, AD Alzheimer’s disease. *: last visit. Those subjects have been diagnosed recently and they are still under follow-up. The indicated visit is the last visit of the subject