Which ONE of the following is not a common site of a berry aneurysm?

The answer is E. Congenital or berry aneurysms are due to a defect in the medial coat at sites of bifurcation of the intracerebral arteries; the commonest sites are middle cerebral bifurcation (B), anterior communicator and anterior cerebral (C), internal carotid and posterior communicator (D) and on basilar artery (A). The aneurysms are often multiple.