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Is Alzheimer’s disease
hereditary?
Alzheimer’s disease occurs in two forms — early-onset and late-onset. The early-onset form of the disease is less common and mainly affects people in their 30s, 40s and 50s. It has been linked to three different genes; individuals who carry one of the early-onset genes will most likely develop Alzheimer’s disease.
Much more common is the lateonset form of the disease, which occurs after age 65 and accounts for more than 90 percent of all cases of Alzheimer’s. It is unclear whether a genetic abnormality, environmental factors or a combination of both causes this form of the disease.
What is known for certain is that a person’s risk of developing Alzheimer’s at any given age appears to increase if he or she has an immediate relative with the disease, such as a brother, sister or parent.
93.6%