Pathology of subarachnoid haemorrhage

Pathology of subarachnoid haemorrhage

Berry aneurysms tend to arise at arterial junctions in the Circle of Willis

Between posterior communicating and internal carotid: posterior communicating artery aneurysm.

Between anterior communicating and anterior cerebral arteries: anterior communicating artery aneurysm

At bifurcation of middle cerebral artery: middle cerebral artery aneurysm

The aneurysm then ruptures and blood goes into the subarachnoid space, leading to the symptoms.