Vascular Pathology: Vascular Disease: Two Specimens of the Circle of Willis Showing Berry Aneurysms

An aneurysm bulges from the brain's basilar artery.....
01 April 2011
Presented by Sebastian Lucas


Berry aneurysms


The upper specimen is from a 43 year old woman who died of a subarachnoid haemorrhage. It shows an aneurysm measuring some 20-25 mm in diameter, which bulges from the angle of bifurcation of the basilar artery into the interpeduncular fossa. The lower specimen is an incidental finding from the autopsy of a 68 year old woman who died of myocardial infarction. The circle of Willis shows atheroma, at the junction of the internal carotid and posterior communicating arteries there is a small aneurysmal dilatation filled with clot.


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