Table 1:
Angioarchitectural features
| Feature | No. (relative frequency) |
|---|---|
| Location | |
| Transverse and/or sigmoid sinus | 46 (41.8%) |
| Tentorial/petrosal | 25 (22.7%) |
| Superior sagittal sinus | 20 (18.2%) |
| Torcular | 7 (6.4%) |
| Anterior cranial fossa | 6 (5.5%) |
| Sphenoparietal sinus | 4 (3.6%) |
| Others | 2 (1.8%) |
| Cognard and Borden type | |
| Cognard I | 12 (10.9%) |
| Cognard IIa | 7 (6.4%) |
| Cognard IIb | 2 (1.8%) |
| Cognard IIa+b | 10 (9.1%) |
| Cognard III | 28 (25.5%) |
| Cognard IV | 51 (46.4%) |
| Borden I | 19 (17.3%) |
| Borden II | 11 (10.9%) |
| Borden III | 79 (71.8%) |
| Feeder territories | |
| Middle meningeal artery | 96 (87.3%) |
| Occipital artery | 83 (75.5%) |
| Internal carotid artery (dural branches) | 41 (37.3%) |
| Verterbral artery (dural branches) | 41 (37.3%) |
| Superficial temporal artery | 32 (29.1%) |
| Ascending pharyngeal artery | 27 (24.5%) |
| Other features | |
| DAVFs with <10 arterial feeders | 56 (50.9%) |
| DAVFs with ≥10 arterial feeders | 54 (49.1%) |
| Bilateral feeders | 56 (50.9%) |
| Pial artery supply | 41 (37.3%) |