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A 19-year-old man presented with thoracic back pain. (a) Sagittal T1-W MR image shows curvilinear signal voids in the posterior epidural space spanning the T2–T4 vertebral levels (arrows). (b) Axial T2-W MR image at the T4–T5 level shows the aberrant vessels (arrowheads) traversing the right neural exit foramen and abutting the exiting right T4 nerve root (arrow). These vessels were noted to drain into the azygos vein (not shown). No cord oedema is seen.
