What are the different types of subarachnoid haemorrhage?
Traumatic and spontaneous.
What is the most common cause of a spontaneous subarachnoid haemorrhage?
Rupture of an intracranial 'berry' aneurysm.
Plain axial CT scan reveals areas of blood density noted in the subarachnoid spaces involving the sulcal spaces, Sylvian fissures and all basal cisterns bilaterally.
This is suggestive of a subarachnoid haemorrhage.
Another area of blood density noted in the left inferior frontal region suggestive of a contusion.
This is a coup-contrecoup injury.
Bone window reveals a fracture of the right parieto-occiptal bone with a subgaleal haematoma surrounding it. Subgaleal haematoma also noted in the left temporal region.