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How common is Alzheimer disease among dementia cases in people over age 60?
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Alzheimer disease
Histopathologic image of neuritic plaques in the cerebral cortex in a patient with Alzheimer disease of presenile onset (onset before age 65).
Alzheimer disease is recognized as the most common form of dementia among older individuals. In patients over the age of 60, it is responsible for approximately two-thirds of all dementia cases.1