What does this CT scan show?

What does this CT scan show?

Hyperdense blood in the subarachnoid space in keeping with subarachnoid haemorrhage: Widely distributed within the basal cisterns, Sylvian and interhemispheric fissures Results in classical “star sign” distribution with blood distributed around...

What are the causes of subarachnoid haemorrhage?

Aneurysmal SAH (aSAH)Cause 75% Saccular (berry) aneurysm ACOM (35%)PCOM and ICA (35%)MCA (20%)Bifurcation of the basilar artery (4%)Posterior circulation (8%)Mycotic aneurysm (rare) Non-aneurysmal SAH Peri mesencephalic haemorrhage (10%)A-V Malformations...

Case Information

You suspect an underlying saccular aneurysm arising from the cerebral circulation as the cause of the subarachnoid...