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Table 2: 
dAVF characteristics
All Patients (n = 178)dAVF and CVT (n = 55)adAVF Only (n = 123)b
Cognard dAVF classification (n/N) (%)
 Benign
  I58/178 (33)23/55 (42)35/123 (28)
  IIa28/178 (16)12/55 (22)16/123 (13)
 Aggressive
  IIb25/178 (14)16/55 (29)9/123 (7)
  IIa+b15/178 (8)8/55 (15)7/123 (6)
  III33/178 (19)6/55 (11)27/123 (22)
  IV40/178 (22)4/55 (7)36/123 (29)
  V2/178 (1)0/552/123 (2)
dAVF treatment type (n/N) (%)
 Conservative61/178 (34)42/55 (39)38/123 (31)
 Endovascular only113/178 (63)36/55 (65)77/123 (63)
 Surgical resection only8/178 (4)2/55 (4)6/123 (5)
 Endovascular + surgical resection14/178 (8)5/55 (9)9/123 (7)
 Endovascular + surgical resection + stereotactic radiation therapy2/178 (1)2/55 (4)0/123
  • ↵a Eight patients had 2 dAVFs, 1 patient had 3 dAVFs, and 1 patient had 5 dAVFs.
  • ↵b Six patients had 2 dAVFs, and 1 patient had 4 dAVFs.