Hundreds of thousands of people have early-onset (sometimes called younger-onset) Alzheimer's disease, or a related dementia. People can be afflicted as young as in their 30's or 40's.

 Early-Onset Alzheimer's Overviews
 Early-Onset Dementia Diagnosis
 Early-Onset Dementia Overviews
 Early-Onset Familial Alzheimer's Disease (eFAD)