Article Figures & Data
Figures
- Fig 1.
Imaging features of an SDAVF. Sagittal T2WI (A) shows high signal in cord (arrow) and serpiginous flow voids (arrowhead). The ventral epidural space is clear on axial T2WI (B). Axial (C) and coronal (D) reconstructions of MRA-MIP show tuft of vessels at the left L2 dural sleeve (arrow) corresponding to the site of fistula (arrow) on frontal projection on DSA (E). The radicular vein is shown by arrowhead on images D and E.
- Fig 2.
Patient 1. Imaging features of SEAVF with intradural venous reflux. Sagittal T2WI (A) shows high signal in cord (arrow) and serpiginous flow voids (arrowhead). Axial T2WI (B) and axial reconstruction of MRA-MIP (C) show the arterialized left anterolateral epidural venous pouch (arrow). Coronal reconstruction of MRA-MIP (D) and frontal projection on DSA (E) show arterialized contralateral epidural veins (dashed arrow) and the radicular vein (arrowhead) arising from the superior aspect of the venous pouch (arrow).
- Fig 3.
Montage of SEAVFs (patients 2–7). A, Sagittal T2 showing edematous cord with perimedullary flow voids. B, Contrast-enhanced MRA and C, DSA show arterialized epidural venous pouch (arrow), refluxing radicular vein (arrowhead), and additional arterialized epidural veins (dashed arrow). Note that the refluxing radicular vein arises from the arterialized epidural venous pouch except in patient 2, where it arises from the arterialized epidural veins superior to the level of pouch.
- Fig 4.
Epidural venous pouch on T2WI (patients 2–7). Epidural venous pouch (arrow) on axial T2WI. The pouch is a subtle finding with variable signal and simulates disc herniation and, therefore, is hard to identify without MRA correlation.
