• Wen-Xin Wang, Zhe Xue, Lin Li, Chen Wu, Yan-Yang Zhang, Xin Lou, Lin Ma, and Zheng-Hui Sun.
• Department of Neurosurgery, Chinese PLA General Hospital, Haidian District, Beijing, China; Department of Neurosurgery, Chinese PLA NO. 180 Hospital, Fengze District, Quanzhou City, Fujian Province, China.
• World Neurosurg. 2017 Apr 1; 100: 450-458.

ObjectiveIntracranial mirror aneurysms are clinically rare and uncommonly reported in the literature. Therefore, the present study evaluated a series of mirror aneurysm cases with respect to the clinical features of the patients and the treatment strategies that were used.MethodsThis study retrospectively reviewed and systematically analyzed the clinical features, imaging data, treatment methods, and treatment outcomes of 68 cases of mirror aneurysms (a total of 70 pairs) in patients who were admitted to our department between November 2007 and May 2016.ResultsThe patient population included 24 male and 44 female patients, with a mean age of 52 years. The mirror aneurysms were primarily located in posterior communicating artery and middle cerebral artery and 65 of the aneurysms were large or giant (≧10 mm). Of the 68 patients, 28 were treated by the clipping or embolization of all aneurysms in one stage, 16 were treated in 2 stages, 16 were treated by treating part of the aneurysms, and 8 were observed. The modified Rankin Scale scores of the 60 patients that were treated indicated that 52 had a good recovery (modified Rankin Scale score ≦2; 86.7%), and 1 patient died.ConclusionsTreatment strategies for mirror aneurysms should be determined individually according to the location, size, and morphology of the aneurysm, as well as the clinical manifestations of each patient. Furthermore, the responsible ruptured aneurysm should be given treatment priority, whereas the contralateral unruptured aneurysm should be observed or treated in either 1 or 2 stages.Copyright © 2017 Elsevier Inc. All rights reserved.

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