Key points

Alzheimer (60-80%)

Vascular (10-20%)

Mixed dementia

Fronto-temporal dementia

Clinical subtypes

Dementias with Parkinsonism

Dementia with Lewy bodies
Progressive supranuclear (PSP) Dementia
Cortico basal degeneration
Multi-system atrophy (includes Shy-Drager syndrome)

Reversible dementias

The 'Dementia Screen'
to rule out reversisble cause or acute organic brain sydromes

Depression ('pseudodementia') may mimic the cognitive deficits of dementia