Figure 2. Spinal angiograms.(a) Anteroposterior angiograms obtained from the right L2 artery show the two fine feeders and the fistula sites (arrows). (b) Left L3 injection shows one more fistula. (c) Lateral angiogram of the right L2 injection shows the extracanalicular location of the fistula. (d) Sagittal late phase image shows tangles of veins forming a dilated tortuous perimedullary vein (arrows).