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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%)