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Published online by Cambridge University Press: 21 November 2024
Though less common than vascular dementia, Alzheimer’s disease, and dementia with Lewy bodies, frontotemporal dementia (FTD) is the most common cause of dementia in those younger than 60 years old, with most cases occurring from 45 to 65 years of age. There are two major types of FTD, behavioral FTD and primary progressive aphasia; and three subtypes of primary progressive aphasia (nonfluent agrammatic, semantic, and logopenic), grouped by their predominant features. Behavioral FTD (bvFTD) has prominent personality and behavioral changes, as well as executive function impairment. Primary progressive aphasia (PPA) is characterized by a predominant language impairment.
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