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Radiculopathy: post-intervention CT

After injection of the mixture of iodine-based contrast agent, local anesthetic, and glucocorticoid, a final axial CT shows the contrast agent around the nerve sheath (white arrow) as well as in the epidural space (black arrows). The distribution of the local anesthetic and the glucocorticoid can be assumed to be identical to the contrast agent. (Contributed by Kristine Ann Blackham MD.)