An evaluation of contrast dispersal pattern on preganglionic epidural injection through trans-lateral recess approach in patients with lumbosacral radiculopathy.

Purpose: To evaluate the accessibility of the preganglionic epidural space in patients with lumbosacral radiculopathy treated with epidural steroid injection (ESI) through trans-lateral recess (TLR) approach.

Methods: From September 2016 to December 2016, we enrolled 50 consecutive preganglionic ESI through TLR approach for 38 patients with lumbosacral radiculopathy at or below L4 territory. Fifteen of patients were diagnosed with lumbar disc herniation and 23 with lumbar spinal stenosis.