Aneurysm characteristics
| No of aneurysms | % | |
|---|---|---|
| Total No of aneurysms | 10 845 | 100 |
| Location of aneurysms | ||
| Anterior circulation aneurysms | 6766 | 62.4 |
| ICA | 2732 | 25.2 |
| MCA | 2552 | 23.5 |
| ACA | 1205 | 11.1 |
| Posterior circulation aneurysms | 1014 | 9.3 |
| Basilar tip | 318 | 2.9 |
| All others | 243 | 2.2 |
| Location not reported | 3065 | 28.3 |
| Size (mm)* | ||
| <10 | 3771 | 34.8 |
| 10–24 | 1704 | 15.7 |
| ≥25 | 476 | 4.4 |
| Not reported | 4894 | 45.1 |
| Other aneurysm characteristics | ||
| Thrombosed | 76 | 0.7 |
| Calcified | 30 | 0.3 |
*Regrouped size: aneurysms 7–12 mm were classified as small, 6–16 mm as large.
ACA, anterior cerebral artery; ICA, internal carotid artery; MCA, middle cerebral artery.