Aneurysm characteristics (n = 131)a
| Variable | Frequency |
|---|---|
| Location | |
| Trunk | 125 (95.4%) |
| Bifurcation | 6 (4.6%) |
| Branch arising from the sac | 49 (37.4%) |
| Topography | |
| Cavernous ICA | 13 (9.9%) |
| Ophthalmic ICA | 89 (67,9%) |
| Communicating ICA | 20 (15,2%) |
| Carotid bifurcation | 2 (1.4%) |
| AcomA | 3 (2.2%) |
| MCA | 1 (0.7%) |
| Basilar artery | 1 (0.7%) |
| Vertebral artery | 2 (1.4%) |
| Size | |
| Small | 118 (90.1%) |
| Large | 13 (9.9%) |
| Large neck | |
| No | 9 (6.9%) |
| Yes | 122 (93.1%) |
| Rupture etiology | 1 (0.7%) |
| Saccular | 130 (99.3%) |
| Dissecting | 1 (0.7%) |
| Prior treatment | 4 (3%) |
Note:—AcomA indicates anterior communicating artery; ICA, internal carotid artery; MCA, middle cerebral artery.
↵a Values expressed as absolute and relative frequency.