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[Editorial] Dementia—not all about Alzheimer’s

Dementia resulting from Alzheimer’s disease has catapulted into the public’s consciousness in the past few years. However, dementia has many causes—not just Alzheimer’s, and the symptoms of non-Alzheimer’s dementias can be very different. A three-paper Series in The Lancet summarises the most common non-Alzheimer’s disorders that cause dementia. In the first, Jee Bang and colleagues discuss frontotemporal dementia. The disorder has three variants: behavioural-variant, associated with behavioural deficits; non-fluent variant primary progressive aphasia, with language deficits; and semantic-variant primary progressive aphasia, a disorder of semantic knowledge and naming.

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