Brain haemorrhage - Bleeding within or around the brain that is caused either by injury or by spontaneous rupture of a blood vessel. There are 4 possible types of brain haemorrhage: subdural, extradural, subarachnoid, and intracerebral.
Extradural and subdural haemorrhages are usually the result of a blow to the head (see head injury). Subarachnoid and intracerebral haemorrhages usually occur spontaneously due to rupture of aneurysms or small blood vessels in the brain.
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