Contrast Agent Induced Obliteration of a Spinal Arteriovenous Malformation

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Fig 1.
A and B, Sagittal T2-weighted MR images showing tortuous enlarged perimedullary and radicular veins (white arrows) and the posteriorly located AVM nidus (black arrow, B).
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Fig 2.
A and B, Spinal angiograms showing the great anterior radiculomedullary artery at T9 left (gray arrow) supplying the AVM in the arterial (A) and venous (B) phase. Note that the anterior spinal artery runs all the way down and around the conus to supply the posteriorly located AVM (black arrow). C and D, Later injections at the same pedicle show no contrast filling of the AVM in the arterial (C) and venous phase (D) and a patent anterior spinal artery (white arrowhead), which runs around the conus (black arrowhead, D).
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Fig 3.
A and B, Pre- (A) and postangiography (B) T2-weighted MR images showing complete disappearance of the tortuous enlarged veins and a small remnant of the AVM (black arrow, B). C, High-resolution MR angiogram demonstrates the radiculomedullary artery at T9 left (gray arrow) with a patent anterior spinal artery (white arrowhead). D, Spinal angiogram confirms persistent obliteration of the AVM with a patent anterior spinal artery (white arrowhead).