FIG 1. Lateral fluoroscopic images of a 52-year-old man with back pain and leg pain during LESI procedure.

A, Contrast medium injected at loss of resistance is seen overlying the deep paraspinal region just posterior to the ligamentum flavum and spinal canal (arrows).

B, The needle was advanced and the epidural space is correctly engaged and the correct needle-tip location is confirmed with epidurogram (white arrow). Initial injection is also visible (black arrowhead).