What is the most common symptom of a subarachnoid haemorrhage (SAH)?
What structures limit the extent of an extradural haemorrhage (EDH)?
What is the most common cause of a subarachnoid haemorrhage (SAH)?
Ruptured berry aneurysm (85%)
A subarachnoid haemorrhage secondary to rupture of a berry aneurysm in the lateral base of the calvarium is depicted. Note that the blood is not confined by sutures (extradural) and is not contained between dural layers (subdural).