At What Age Is Dementia Considered to Be Early?

At What Age Is Dementia Considered to Be Early?

At What Age Is Dementia Considered to Be Early?

Alzheimer's disease is considered to be early-onset when it occurs in people younger than 65. Approximately 5 percent of people with Alzheimer's disease, which is the most common form of dementia, first show symptoms in their 40s or 50s, according to Alzheimer's Association.

Early-onset Alzheimer's is often undiagnosed because physicians don't tend to look for the symptoms in younger patients. As of 2015, doctors do not know what causes early-onset Alzheimer's disease. Younger patients experiencing memory problems should keep a log of their memory and cognitive difficulties to show to a doctor. Further diagnosis typically involves memory tests, neurological tests and brain imaging, as stated by Alzheimer's Association.