Fig 6. Thromboembolic events related to aneurysm localization (percentages). Percentages are related to the total number of aneurysms for each localization. CI: carotid siphon, 6.3–18.0%; anterior communicating artery and anterior cerebral artery, 4.5–17.8%; middle cerebral artery, 12.3–37.5%; basilar artery, 3.7–37.9%.