Abstract
“So-called” posterior communicating artery aneurysm usually mean the one arising from the internal carotid-posterior communicating junction. The aneurysms arising from the posterior communicating artery itself have been very rarely reported, and we report such a case.
A 40-year-old woman was referred to our clinic with the diagnosis of subarachnoid hemorrhage. Cerebral angiography revealed an aneurysm of the posterior communicating artery. She underwent an operation at day 1 and grade 2 (Hunt & Hess). A saccular aneurysm was found to be arising from the posterior communicating artery 3 mm distal to its origin from the internal carotid artery and projecting laterally and inferiorly. There was no branching observed around the neck. The aneurysm was clipped without difficulty. The patient was discharged without any neurological deficits.
The literature of this “true” posterior communicating artery aneurysm was reviewed, and technical points to be noted at surgery were discussed.
