ISSN 1738-6217 (Print)
View Full Text

J Kor Soc Ster Func Neurosurg. 2018 14(1): 7-9
ⓒ Journal of the Korean Society of Stereotactic and Functional Neurosurgery
Thrombosed Posterior Communicating Artery Aneurysm Mimicking an Extra-Axial Tumor
Jae-Gwang Lee, MD, Seong-Hyun Park, MD, PhD
Department of Neurosurgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea

We report a rare case of a thrombosed posterior communicating artery aneurysm mimicking an extra-axial tumor. A 69-year-old woman was admitted to a local clinic for regular checkup. A brain computed tomography on admission revealed a 1.5cm nodular high intensity lesion in the left basal cistern. Brain magnetic resonance imaging revealed a heterogeneous low signal intensity on T2-weighted image, a high signal intensity on T1-weighted image, and a subtle contrast enhancement after gadolinium injection. Location and radiological appearance of the lesion resembled that of an extra-axial tumor, except for finding of signal void on T2-weighted image and high signal portion on T1-weighted image. After cerebral angiography, the nodular lesion was diagnosed as a thrombosed aneurysm arising from the posterior communicating artery. The patient was successfully treated via surgical clipping. We should consider the possibility of a posterior communicating artery aneurysm when an enhancing nodular lesion is in the basal cistern, adjacent to the internal cerebral artery.
Key words : Aneurysm, Basal cistern, Extra-axial tumor, Posterior communicating artery.
중심단어 : Aneurysm, Basal cistern, Extra-axial tumor, Posterior communicating artery.

Tel: 02-2227-4251 Fax: 02-393-9979 Copyrightⓒ The Korean society of stereotactic and functional neurosurgery. All rights reserved.