Fig. 5. Lumbar SDAVF with arterial feeding from left L2 lumbar artery of 53-year-old man presenting with bilateral weakness in lower extremities and urinary bladder frequency.

A. Sagittal T2-weighted spinal MR image reveals hyperintensity (hollow arrows) with flow voids (white arrows) mostly at posterior surface of spinal cord. B. Superselective angiography evidently shows feeding artery (hallow arrow), SDAVF (white arrow) and tortuous draining vein (black arrow). SDAVF = spinal dural arteriovenous fistula C. Angiogram of left L2 lumbar artery in frontal view before treatment demonstrates fistula (white arrow) and tortuous vein (hollow arrow). D. Angiogram of left L2 lumbar artery in frontal view after treatment reveals result of successful endovascular embolization without opacification of fistula or tortuous vein.