Illnesses associated with a potentially treatable dementia
| Depressive pseudodementia |
| Space occupying lesions |
| Benign tumours, especially subfrontal meningiomas |
| Subdural haematoma |
| Hydrocephalus |
| Deficiency states |
| Vitamins B12, B1 (Wernicke-Korsakoff), B6 |
| Niacin (Pellagra) |
| Endocrine disease and metabolic disorders |
| Hypothyroidism |
| Chronic hypocalcaemia |
| Recurrent hypoglycaemia |
| Cushing’s disease |
| Addison’s disease |
| Uraemia |
| Hepatic encephalopathy |
| Hashimoto’s encephalopathy |
| Infections |
| AIDS dementia complex |
| Lyme disease |
| Tuberculosis (TB) |
| Syphilis |
| Inflammatory and vasculitides |
| Systemic lupus erythematosis |
| Giant cell arteritis |
| Polyarteritis nodosa |
| Behçet’s disease |
| Neurosarcoidosis |
| Alcoholic dementia |
| Chronic intoxications |
| Heavy metals |
| Drugs |
| Carbon monoxide poisoning |
| Wilson’s disease |
| Whipple’s disease |
| Limbic encephalitis (paraneoplastic or associated with voltage gated potassium channel antibodies) |