Patient profile
| Total No. of patients treated | 468 |
| Age, y | |
| Range | 10–96 |
| Mean | 50.1 |
| Sex | |
| Female | 302 (64.5%) |
| Male | 166 (35.5%) |
| Presenting symptom | |
| SAH | 70 (15%) |
| Headache | 274 (58.5%) |
| Incidental | 104 (22.2%) |
| Cranial nerve palsy | 9 (1.9%) |
| Ischemic events | 6 (1.3%) |
| Epilepsy | 4 (0.9%) |
| Mass effect | 1 (0.2%) |