While Alzheimer's disease is the most common cause of dementia, there are an estimated 50 or more types of dementia including:
- Vascular dementia, which is caused by brain damage from cerebrovascular or cardiovascular problems such as strokes, heart problems, and genetic diseases.
- Lewy body dementia, a progressive dementia linked to the abnormal protein present in Parkinson's disease.
- Frontotemporal dementia, in which nerve cells in the frontal and temporal lobes of the brain deteriorate.
- HIV-associated dementia, which occurs in people with HIV.
- Huntington's disease, a hereditary disorder caused by a faulty gene, which causes degeneration in many regions of the brain and spinal cord.
- Dementia pugilistica, which results from repeated head trauma.
- Corticobasal degeneration, a progressive disorder linked to the accumulation of an abnormal protein in the brain.
- Secondary dementias, dementia that occurs in patients with disorders that primarily affect movement – Parkinson's disease, multiple sclerosis, motor neuron diseases such as amyotrophic lateral sclerosis (Lou Gehrig's disease), olivopontocerebellar atrophy, Wilson's disease, and normal pressure hydrocephalus.