Locations of aneurysms
| Location | Number |
|---|---|
| Anterior circulation | 37 |
| Ophthalmic artery | 2 |
| Paraclinoid internal carotid artery | 3 |
| Posterior communicating artery | 7 |
| Anterior choroidal artery | 2 |
| Internal carotid bifurcation | 1 |
| Anterior communicating artery | 19 |
| Middle cerebral bifurcation | 3 |
| Posterior circulation | 46 |
| Basilar caput | 34 |
| Posterior cerebral artery | 1 |
| Superior cerebellar artery | 2 |
| Basilar trunk | 2 |
| Vertebrobasilar junction | 4 |
| Posterior inferior cerebellar artery | 3 |