Evaluation of Transforaminal Epidural Steroid Injection in Radicular Low Back Pain According to MSU Classification

Inclusion Criteria: * between the ages of 18-65 * After outpatient evaluation, a decision was made to perform transforaminal steroid injection, * Low back pain of more than 6 on a numeric rating scale (NRS) * Radiculopathy for more than 4 weeks and less than one year and straight leg raising \<45 * Disc herniation at the L4-L5 or L5-S1 level on MRI * Failure to respond to medical treatment for at least one month Exclusion Criteria: * Neurological deficit, * Bleeding problems, * Localized infection, * Spinal pathologies (such as tumors), * Fractures, * Severe stenosis, * Uncontrolled diabetes, * Pregnancy, * Red flag symptoms (such as motor and/or sphincter dysfunction) * Patient reluctance, * Computed tomography (CT) and MRI findings in favor of sequestrated fragments from herniated disc, * Sphincteric disorders, * Previous spine surgeries