Down Syndrome Topic Guide

Down Syndrome: Down syndrome is a genetic disorder that is caused by an extra chromosome 21. Down syndrome is also referred to as Trisomy 21. Other variations of Down syndrome include Robertsonian translocation and partial/segmental trisomy, and mosaic Down syndrome. There is no treatment for Down syndrome.

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Alzheimer's Disease in Individuals With Down Syndrome Alzheimer's disease (AD) is the most common form of dementia (see Dementia Overview for more information). The disease is progressive, and the brain degenerates (see Alzheimer's Disease). Alzheimer's disease is ...