Epidural Intervention of Spinal Nerves With Tumor Necrosis Factor-Alpha Inhibitor

Inclusion Criteria: * Diagnosis of spinal stenosis with radicular pain at least 5 scores of VAS(ranging from 0 to 10). * Failed to improve symptom significantly through conservative treatment, including physiotherapy, chiropractic therapy, exercise, medication and bed rest. Exclusion Criteria: * lumbar surgery history, * spinal stenosis without radicular pain, * uncontrollable or unstable use of opioids, * uncontrolled mental illness, * pregnant or lactating women, * patients with a history of adverse reactions or possible adverse reactions to local anesthetics, etanercept or Steroids.