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Fig 1. A, Axial T2-weighted spinal MR image at the level of L4–5 shows enlarged epidural veins characterized by signal void, causing a mass effect and displacing the thecal sac posteriorly. B, More cranial image depicts the scallopping of the posterior margin of L3 vertebra (open arrows) and the continuity of the epidural veins with paravertebral venous plexus via neural foraminae bilaterally (arrows).
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