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Types of Dementia
A clear visual guide to the dementia umbrella—and questions that help families make informed decisions.
Alzheimer’s disease is a type of dementia, but dementia is not one single disease. Understanding that distinction can help families ask better questions and seek a complete medical evaluation when memory or thinking changes appear.
Why this distinction matters
Memory loss does not automatically mean Alzheimer’s disease. Dementia Australia notes that more than 100 conditions can cause dementia. Classification varies; the chart highlights selected common and less common causes. Some conditions can resemble dementia, and more than one disease process may be present.
A complete medical evaluation can help identify the underlying cause and guide appropriate care, treatment and planning.
Continue planning with confidence
Use this educational guide alongside our practical senior living tools when preparing questions, touring communities and comparing options.
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Educational information only. This resource is not a diagnosis or a substitute for medical advice. Please consult a qualified healthcare professional about individual symptoms or concerns.
Source: Dementia Australia. For the complete explanation and additional sources, read our Types of Dementia guide. Reviewed October 2026.