Alzheimer’s is a disease that causes dementia. It is the most common cause of dementia, accounting for about two-thirds of cases in the elderly.
Vascular Dementia is the second most common cause of dementia after Alzheimer’s disease.
Dementia with Lewy bodies (DLB) is the third most common cause of dementia.
Frontotemporal dementia or FTD (sometimes called Pick’s disease) is a relatively rare form of dementia.