Blood tests can help diagnose Alzheimer’s — if they’re accurate enough. Not all are

(By Jon Hamilton for NPR)

A new generation of blood tests is poised to change the way doctors determine whether patients with memory loss also have Alzheimer’s disease.

The tests detect substances in the blood that indicate the presence of sticky amyloid plaques in the brain — a hallmark of Alzheimer’s. So these tests have the potential to replace current diagnostic procedures, like costly PET scans and uncomfortable spinal taps. Continue reading here…

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