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Neurology. Early-onset Alzheimer's disease ( EOAD ), also called younger-onset Alzheimer's disease ( YOAD ), [ 1] is Alzheimer's disease diagnosed before the age of 65. [ 2] It is an uncommon form of Alzheimer's, accounting for only 5–10% of all Alzheimer's cases. About 60% have a positive family history of Alzheimer's and 13% of them are ...
Posterior cortical atrophy ( PCA ), also called Benson's syndrome, is a rare form of dementia which is considered a visual variant or an atypical variant of Alzheimer's disease (AD). [ 1][ 2][ 3] The disease causes atrophy of the posterior part of the cerebral cortex, resulting in the progressive disruption of complex visual processing. [ 4]
Alzheimer's disease ( AD) is a neurodegenerative disease that usually starts slowly and progressively worsens, [ 2] and is the cause of 60–70% of cases of dementia. [ 2][ 15] The most common early symptom is difficulty in remembering recent events. [ 1] As the disease advances, symptoms can include problems with language, disorientation ...
Frontotemporal dementia is an early onset disorder that mostly occurs between the ages of 45 and 65, [ 13] but can begin earlier, and in 20–25% of cases onset is later. [ 11][ 14] Men and women appear to be equally affected. [ 15] It is the most common early presenting dementia. [ 16]
Pseudodementia (otherwise known as depression-related cognitive dysfunction or depressive cognitive disorder) is a condition that leads to cognitive and functional impairment imitating dementia that is secondary to psychiatric disorders, especially depression. Pseudodementia can develop in a wide range of neuropsychiatric disease such as ...
Vascular dementia is the second-most-common form of dementia after Alzheimer's disease in older adults. [4] The prevalence of the illness is 1.5% in Western countries and approximately 2.2% in Japan.
Mild cognitive impairment ( MCI) is a neurocognitive disorder which involves cognitive impairments beyond those expected based on an individual's age and education but which are not significant enough to interfere with instrumental activities of daily living. [ 1] MCI may occur as a transitional stage between normal aging and dementia ...
Logopenic progressive aphasia. Logopenic progressive aphasia ( LPA) is a variant of primary progressive aphasia. [ 1] It is defined clinically by impairments in naming and sentence repetition. [ 2] It is similar to conduction aphasia and is associated with atrophy to the left posterior temporal cortex and inferior parietal lobule.