Aneurysm location and size
| Location | No. of Aneurysms (%) | Aneurysm Size (mean) |
|---|---|---|
| Anterior circulation | 390 (89.7) | 4.52 |
| ICA-ophthalmic | 10 (2.3) | 4.76 |
| ICA bifurcation | 12 (2.3) | 4.52 |
| Cavernous ICA | 16 (3.68) | 4.89 |
| ICA-anterior choroidal artery | 18 (4.14) | 4.39 |
| ICA-superior hypophyseal artery | 55 (12.6) | 3.93 |
| ICA-other locations | 120 (27.6) | 4.47 |
| ACA | 18 (4.14) | 4.81 |
| Posterior communicating artery | 38 (8.74) | 4.53 |
| MCA | 46 (10.6) | 4.37 |
| Anterior communicating artery | 57 (13.1) | 4.88 |
| Posterior circulation | 45 (10.3) | 4.22 |
| Anterior inferior cerebellar artery | 2 (0.46) | 3.67 |
| Posterior inferior cerebellar artery | 2 (0.46) | 4.19 |
| Basilar trunk | 2 (0.46) | 2.22 |
| Vertebral artery | 4 (0.92) | 5.81 |
| Posterior cerebral artery | 5 (1.15) | 3.37 |
| Superior cerebellar artery | 10 (2.3) | 3.40 |
| Basilar tip | 20 (4.60) | 4.78 |
Note:—ICA indicates internal carotid artery; ACA, anterior cerebral artery; MCA, middle cerebral artery.