Early-onset Alzheimer's disease

Early-onset Alzheimer's disease (EOAD), also called younger-onset Alzheimer's disease (YOAD), is Alzheimer's disease diagnosed before the age of 65. It is an uncommon form of Alzheimer's, accounting for only 5–10% of all Alzheimer's cases.

Source: Wikipedia — Early-onset Alzheimer's disease (CC BY-SA 4.0)