• Courtesy of Prem S. Subramanian, MD, PhD.
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    Computed tomographic angiogram demonstrating an aneurysm of the left posterior communicating artery. A, Axial and B, coronal views show the aneurysm (white arrows) at the junction of the internal carotid artery (red arrows) and posterior communicating artery (green arrow). The patient presented with a pupil-involving, partial left third nerve palsy.