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Causes of dementia
| Common causes | Uncommon causes |
|---|---|
| Alcoholism | AIDS |
| Alzheimer's disease (>60% of all dementia) | Brain trauma, haemorrhage or infection |
| Cortical Lewy body dementia (10%) | Creutzfeldt–Jakob disease |
| Huntington's chorea | Metabolic causes (e.g. hypothyroidism) |
| Hydrocephalus | Pick's disease (frontal lobar atrophy) |
| Multi-infarct dementia (25%) | |
| Tumours | |
