Infectious conditions
- Viral meningoencephalitis
- Bacterial meningoencephalitis
- TB meningitis
- Fungal meningitis
- Neurosyphilis
- Lyme disease
- Parasitic infections
- V-P shunt infection
Inflammatory conditions
- Cerebral vasculitis
- Demyelinating disease
Vascular conditions
- Subarachnoid haemorrhage
- Subdural haemorrhage
- Epidural haematoma
- Stroke
Other
- Seizures
- Epidural anaesthesia
- Cerebral malignancy or metastases