Table 1. Clinical and anatomical characteristics in the study cohort.
| Clinical and anatomical characteristics | Number (%) |
|---|---|
| Symptoms | |
| Hemorrhage | 15/51 (29.4) |
| Infarction | 9/51 (17.6) |
| Seizure | 4/51 (7.8) |
| Other | 24/51 (47.1) |
| Arterial pedicles | |
| MMA | 51/51 (100) |
| STA | 32/51 (62.7) |
| OA | 25/51 (49.0) |
| AFA | 9/51 (17.6) |
| PMA | 9/51 (17.6) |
| MHT | 5/51 (9.8) |
| AphA | 3/51 (5.9) |
| PAA | 1/51 (2.0) |
| Pial arterial supply | 11/51 (21.6) |
| Stenosis/occlusion of SSS | 19/51 (37.3) |
| Borden classification | |
| I | 4/51 (7.8) |
| II | 19/51 (37.3) |
| III | 28/51 (54.9) |
| Cognard classification | |
| I | 3/51 (5.9) |
| IIa | 1/51 (2.0) |
| IIb | 7/51 (13.7) |
| IIa + b | 12/51 (23.5) |
| III | 12/51 (23.5) |
| IV | 16/51 (31.4) |
AFA: anterior falcine artery; AphA: ascending pharyngeal artery; MHT: meningohypophysial trunk; MMA: middle meningeal artery; OA: occipital artery; PAA: posterior auricular artery; PMA: posterior meningeal artery; SSS: superior sagittal sinus; STA: superficial temporal artery