For years, researchers have been seeking a cure for Alzheimer’s. In doing so, much of their effort have been focused on the hallmark plaques and tangles that plague the brains of Alzheimer’s patients. But it turns out that dementia doesn’t usually reflect just one type of brain abnormality—which changes how researchers are thinking about prevention and treatment.

More details on this here, from the New York Times:

https://www.nytimes.com/2019/04/08/health/alzheimers-dementia-stroke.html