Presentations and MR imaging findings of intracranial dural arteriovenous fistula according to angiographic type*
| Type I (n = 8) | Type II (n = 12) | Type III (n = 7) | |
|---|---|---|---|
| Presentations* | |||
| Aggressive | 1 (12) | 6 (50) | 7 (100) |
| Nonaggressive | 7 (88) | 6 (50) | 0 |
| MR imaging findings | |||
| Flow void clustering | 6 (75) | 10 (83) | 6 (86) |
| Engorged OV/proptosis | 2 (25) | 6 (50) | 0 |
| WM hyperintensity | 0 | 1 (8) | 3 (43) |
| Hemorrhage | 1 (13) | 4 (33) | 3 (43) |
| Dilated vessels* | 0 | 5 (42) | 7 (100) |
| Venous pouch | 0 | 0 | 2 (29) |
| Vascular enhancement* | 0 | 4 (33) | 7 (100) |
Note.—Types as classified by Borden et al (11). OV indicates ophthalmic vein; WM, white matter. Numbers in parentheses are percentages.
* P < .05.