9 forms of dementia that aren’t Alzheimer’s disease
Learn about other related brain disorders that interfere with cognitive function.
Jan, 2026
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When you hear the word dementia, what comes to mind? It might be Alzheimer’s disease. Alzheimer’s is one of the top causes of death in the United States and the most common form of dementia. But it’s not the only form.
Dementia is an umbrella term for a number of conditions that cause problems with thinking, judgment, or memory. Alzheimer’s accounts for between 60 and 80 percent of all cases of dementia, but other brain disorders can cause dementia as well.
In many cases, people may develop more than one type of dementia. For example, Alzheimer’s disease may occur alongside other forms of dementia, such as vascular dementia or Lewy body dementia. Read on to learn more about these and other types of dementia.
Written byPatrick Sullivan.
Medically reviewed byMegan Burke, MD.
Sources: Alzheimer’s Association. Vascular Dementia. Accessed August 1 + 9
- Alzheimer’s Association. Vascular Dementia. Accessed August 1, 2025.
- Alzheimer’s Association. What Is Dementia? Accessed August 1, 2025.
- Alzheimer’s Association. Parkinson’s Disease Dementia. Accessed August 1, 2025.
- Centers for Disease Control and Prevention. Alzheimer’s Disease and Dementia: About Dementia. August 17, 2024.
- Cleveland Clinic. Dementia. March 12, 2022.
- Johns Hopkins Medicine. Dementia. Accessed August 1, 2025.
- Mayo Clinic. Dementia. June 7, 2025.
- National Institute on Aging. Causes of Alzheimer’s Disease: Alzheimer's Disease Genetics Fact Sheet. March 1, 2023.
- National Institute of Neurological Disorders and Stroke. Dementias. August 27, 2024.
- National Institute on Aging. What Is Dementia? December 8, 2022.