This presentation provides an overview of dementia, including its definition, prevalence, major types, diagnostic evaluation, and distinguishing clinical features. It highlights Alzheimer’s disease as the most common cause of dementia and reviews its staging, neuroimaging patterns, biomarkers, and available treatment options, including symptomatic therapies and emerging immunotherapies. The presentation also covers other degenerative and non-degenerative dementias such as Lewy body dementia, frontotemporal dementia, vascular dementia, Parkinson’s dementia, rapidly progressive dementias, and normal pressure hydrocephalus, along with key diagnostic tools and management strategies.