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Alzheimer's Disease

Identical Twins and Alzheimer`s



If one identical twin gets Alzheimer`s disease, can the other expect to get it also?


Although the exact figures vary from one study to another, it is clear that an identical twin carries a significantly higher risk for AD if the other twin develops the illness.

A well-conducted study of Swedish twin pairs showed a 67% rate of developing AD in the second identical twin, vs. only a 22% rate of AD in the second fraternal twin. (M. Gatz et al., 1997, Journal of Gerontology (Series A. Biological sciences and medical) volume 52, pages M117-125).

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Alzheimer's Disease and Education Referral

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Response by:

Jon Stuckey, PhD
Case Western Reserve University

David   Geldmacher, MD David Geldmacher, MD
Formerly, Assistant Professor of Neurology
School of Medicine
Case Western Reserve University