Aneurysm topography
| Localization | n | % |
|---|---|---|
| Internal carotid artery (cavernous segment) | 6 | 5.6 |
| Internal carotid artery (ophthalmic segment) | 30 | 28 |
| Internal carotid artery (communicating segment) | 3 | 2.8 |
| Anterior choroidal artery | 3 | 2.8 |
| Middle cerebral artery | 28 | 26.2 |
| Pericallosal artery | 2 | 1.9 |
| Anterior communicating artery | 8 | 7.5 |
| Posterior communicating artery | 16 | 15 |
| Posterior cerebral artery | 1 | 0.9 |
| Superior cerebellar artery | 1 | 0.9 |
| Basilar tip | 9 | 8.4 |
| Total | 107 | 100 |