Aneurysm location
| Aneurysm Location | No. of Aneurysms (%) | |
|---|---|---|
| Ruptured | Unruptured | |
| Anterior circulation | 21 (58) | 56 (89) |
| ICA | 11 | 42 |
| Paraclinoid | 1 | 25 |
| PCoA | 7 | 15 |
| AchA | 0 | 1 |
| Bifurcation | 1 | 1 |
| ACA | 8 | 7 |
| MCA | 2 | 7 |
| Posterior circulation | 16 (43) | 7 (11) |
| BA tip | 6 | 3 |
| SCA | 6 | 1 |
| PICA | 2 | 1 |
| PCA | 2 | 2 |
| Total | 37 | 63 |
Note.—ICA, internal carotid artery; PCoA, posterior communicating artery; AchA, anterior choroidal artery; ACA, anterior cerebral artery; MCA, middle cerebral artery; BA, basilar artery; SCA, superior cerebellar artery; PICA, posterior inferior cerebellar artery; PCA, posterior cerebral artery.