Size and location of aneurysms
| Location | ||
| Carotid n = 93 | ||
| Petrous | 6 | |
| Cavernous | 25 | |
| Petrous/Cavernous | 2 | |
| Ophthalmic | 47 | |
| Other intracranial sites | 13 | |
| Posterior circulation n = 7 | ||
| Vertebral | 1 | |
| Vertebrobasilar | 1 | |
| Superior cerebellar | 1 | |
| Posterior cerebral | 2 | |
| Basilar tip | 2 | |
| Average aneurysm size (mm)* | ||
| Median | Range | |
| Dome height | 15 | 4–40 |
| Dome width | 14 | 3–44 |
| Neck width | 7 | 1–25 |
| Total | Neck <4 mm | Neck ≥4 mm | Neck ≥4 mm or D:N <2 | |
|---|---|---|---|---|
| Aneurysm sac (mm) | ||||
| Small (<10 mm) | 21 | 6 | 15 | 18 |
| Large (10–25 mm) | 60 | 3 | 57 | 57 |
| Giant (>25 mm) | 19 | 0 | 19 | 19 |
| n = 100† | 100 | 9 | 91 | 94 |
* 1 aneurysm nearly fusiform mc
† Includes 1 fusiform neck.