2017
DOI: 10.1093/neuros/nyx365
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Characteristics of Unruptured Compared to Ruptured Intracranial Aneurysms: A Multicenter Case–Control Study

Abstract: We show substantial differences in patient and aneurysm characteristics between ruptured and unruptured aneurysms. These findings support the hypothesis that different pathological mechanisms are involved in the formation of ruptured aneurysms and incidentally detected unruptured aneurysms. The potential protective effect of aspirin might justify randomized prevention trials in patients with unruptured aneurysms.

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Cited by 38 publications
(37 citation statements)
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“…With respect to the above-mentioned preceding investigations, our patient sample is in line with the main epidemiological SAH characteristics and, therefore, representative. A total of 78.5% of our patients suffered from bleeding as a result of an aneurysm located at the anterior cerebral circulation with a mean aneurysm size of 5.9 ± 3.2 mm, which is in line with other studies [2,19,28,69]. The SAH severity distribution of the study population differed significantly from other surveys which generally give account of lower percentages of patients grouped into neurologically favorable low SAH grades [2,39].…”
Section: Discussionsupporting
confidence: 86%
“…With respect to the above-mentioned preceding investigations, our patient sample is in line with the main epidemiological SAH characteristics and, therefore, representative. A total of 78.5% of our patients suffered from bleeding as a result of an aneurysm located at the anterior cerebral circulation with a mean aneurysm size of 5.9 ± 3.2 mm, which is in line with other studies [2,19,28,69]. The SAH severity distribution of the study population differed significantly from other surveys which generally give account of lower percentages of patients grouped into neurologically favorable low SAH grades [2,39].…”
Section: Discussionsupporting
confidence: 86%
“…Finally, evidence on dyslipidemia and aneurysm growth/rupture is controversial. Our multivariate analysis found that hypercholesterolemia was not associated with aneurysm rupture, which contradicts data from Hostettler et al, 18 in which hyperlipidemia was inversely related to rupture. Other studies have shown that a statin is associated with an increased risk of rupture, 39 while a recent meta-analysis showed no effect of statins on rupture status.…”
Section: Study Limitationscontrasting
confidence: 99%
“…Another study of 192 patients harboring 234 unruptured IAs 35 showed that aspirin was protective for aneurysm growth (OR 0.72), but the findings did not reach statistical significance, potentially due to the small size of the cohort. On the other hand, in their multivariate analysis of 2334 patients, Hostettler et al 18 demonstrated that aspirin use was inversely associated with rupture (OR 0.65). In our study, ruptured aneurysms were secured within 24 hours from ictus and, hence, we did not find any case of early rebleeding.…”
Section: Zanaty Et Almentioning
confidence: 98%
“…The estimated prevalence of UIAs in the general population is 3% [23]. Our observations demonstrate that UIAs are more commonly located in the ICA and MCA [24]. UIAs were found to have no impact on autoregulation of cerebral circulation [25].…”
Section: Discussionmentioning
confidence: 56%