So for many patients, early diagnosis may not necessarily be something they want, Kodadek said. But from a research perspective, early diagnosis is a key to developing better treatment, he added.
With neurodegenerative diseases, the hope is that drugs could block further decline, making it crucial to know if a person has the disease before they begin having significant symptoms, he said.
The U.S. National Institute on Aging has more on Alzheimer's.
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