The Impact of Contrast Spread Patterns to Clinical Outcomes of Cervical Interlaminar Epidural Steroid Injection: An Observational Study.

Lateral contrast spread toward the dorsal root ganglion (DRG) and spinal nerve root of the target level was associated with more favorable clinical responses. Clinicians performing CIESIs should exert effort to administer the injectate around the DRG and spinal nerve root at the target level.