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Published on: August 11, 2015
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Morphological Risk Factors for Rupture of Small (<7 mm) Posterior Communicating Artery Aneurysms.
Nan Lv1, Zhengzhe Feng1, Chi Wang1
1Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China.
World Neurosurgery
|January 3, 2016
Summary
Morphological features like size ratio and inflow angle are key indicators for rupture risk in small posterior communicating artery aneurysms. These factors can help predict which aneurysms are more likely to rupture, aiding clinical decisions.
Area of Science:
- Neurosurgery
- Neuroradiology
- Cerebrovascular Disease
Background:
- Management of small, unruptured intracranial aneurysms remains controversial.
- Location-specific analysis is crucial due to differing natural histories.
- Focus on posterior communicating artery (PcomA) aneurysms < 7 mm.
Purpose of the Study:
- Investigate morphological discriminators for rupture status in small PcomA aneurysms.
- Identify independent predictors of rupture.
- Aid in clinical risk stratification.
Main Methods:
- Compared clinical and morphological characteristics of 108 small PcomA aneurysms (68 ruptured, 40 unruptured).
- Utilized multivariate logistic regression analysis.
- Assessed parameters including size, aspect ratio, size ratio, dome-to-neck ratio, inflow angle, bleb formation, bottleneck factor, PcomA diameter, and PcomA type.
Main Results:
- Ruptured aneurysms showed significantly larger size, aspect ratio, size ratio, dome-to-neck ratio, inflow angle, and proportion of bleb formation.
- No significant differences in clinical characteristics, bottleneck factor, PcomA diameter, or fetal-type PcomA.
- Multivariate analysis identified size ratio (P=0.012) and inflow angle (P=0.001) as independent predictors of rupture.
Conclusions:
- Morphological characteristics are strongly associated with rupture status in small PcomA aneurysms.
- Size ratio and inflow angle are independent risk factors for rupture.
- These findings can enhance clinical risk stratification for small PcomA aneurysms.
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