FU Gangze,CHEN Yongchun,YANG Yunjun, et al. Distribution characteristics and clinical features of intracranial mirrorimage aneurysms[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2016, 46(10): 765-768.
Abstract：Objective: To investigate distribution characteristics and clinical features of intracranial mirrorimage aneurysms. Methods: The clinical history and images of 48 patients with intracranial mirrorimage aneurysms were analyzed, and 88 patients with ordinary multiple intracraninal aneurysms (MIA) were taken as a comparison group. All patients underwent computed tomography angiography (CTA). Two independent radiologists assessed all the images of CTA and digital subtraction angiography (DSA). Distribution characteristics of intracranial mirrorimage aneurysms were analyzed. The male-to-female ratio, age, rupture proportions, constituent ratio of patients with intracranial micro-aneurysms (aneurysm≤3 mm in maximal diameter) and large aneurysms (≥10 mm in maximal diameter) were statistically compared between patients of intracranial mirrorimage aneurysms and ordinary MIA group, respectively. Results: A total of 48 (35.3%) patients with intracranial mirrorimage aneurysms in 136 patients with MIA were detected. Twenty two cases were seen in posterior communicating artery (PCoA), 12 cases in M1 part of middle cerebral artery, and 14 cases in another location. The male-to-female ratios and rupture proportions were statistically no significant difference between the two groups (P>0.05). 56.3% of patients were under age 60 in patients with intracranial mirrorimage aneurysms and 35.2% in ordinary MIA group. There were statistically significant difference between two groups (x2=5.612, P<0.05). Patients with ≥3 aneurysms were 31.3% in intracranial mirrorimage aneurysms and 15.2% in ordinary MIA. There was statistically significant difference (x2=7.062, P<0.01). Intracranial micro-aneurysms were detected in 54.2% patients in intracranial mirrorimage aneurysms and 73.9% in ordinary MIA, there was statistically significant difference between the two group (x2=5.443, P<0.05). Conclusion: Intracranial mirrorimage aneurysms has characteristic clinical and imaging features. Raising awareness of this diseases provide help for the clinical treatment.
