Fig. 16

Intracranial dural AV fistula. A 69-year-old male with a 1-month history of progressive cognitive decline. a & b axial T2W and GRE images of the brain show prominent superior sagittal sinus (black arrow) with multiple tortuous superficial cortical (arrow head) and medullary veins (white arrow). c right external carotid artery injection reveals dural AV fistula with abnormal communication between superior sagittal sinus (black arrow) and arterial feeders from right middle meningeal artery (dashed black arrow) and transosseous branches of right superficial temporal artery (short black arrow). d Late venous phase of the catheter angiogram shows prominent medullary venous drainage giving the appearance of pseudophlebitic appearance (dashed white arrows)