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.