Aneurysm locations
| Location | No. | % |
|---|---|---|
| Anterior circulation | 449 | (89.8) |
| Cavernous segment of ICA | 11 | (2.2) |
| Siphon of ICA | 126 | (25.2) |
| PcomA | 76 | (15.2) |
| AChoA | 19 | (3.8) |
| ICA bifurcation | 13 | (2.6) |
| AcomA | 97 | (19.4) |
| ACA | 26 | (5.2) |
| MCA | 81 | (16.2) |
| Posterior circulation | 51 | (10.2) |
| BA bifurcation | 34 | (6.8) |
| SCA | 8 | (1.6) |
| PICA | 4 | (0.8) |
| PCA | 4 | (0.8) |
| BA trunk | 1 | (0.2) |
Note:—PCA indicates posterior cerebral artery; SCA, superior cerebellar artery.