Randomized, Prospective Study of Lumbar Transforaminal Epidural Corticosteroid Injection(s) Versus Defined Physical Therapy for the Treatment of Subacute Lumbar Radicular Pain Due to Disc Protrusion

1. Potential research participants identified from clinic population.

• 40 subjects will be enrolled in each group (TFESI and PT). An additional 40 subjects will be enrolled into the concurrent observational cohort.
• Appropriate study subjects will be identified upon initiation of care (MD evaluation and/or physical therapy). They will have pain of less than or equal to three months duration, within the current pain episode. This may be the initial pain episode or the onset of a most recent episode of pain, preceded by at least a six month pain free interval. They will have focal disc protrusion with correlating radicular symptoms and possible radicular/neurological deficits. These radicular symptoms/signs are defined as pain or paresthesias below the knee, pain reproduction with straight-leg-raising and/or extension or quadrant maneuvers, and radicular pattern sensory, reflex or strength changes. These symptoms will be consistent with the level of nerve root impingement. Only subjects with radiculopathy primarily at L5 and/or S1, due to pathology at L4-5 and/or L5-S1 disc levels will be included. Those with canal and foraminal compromise due to disc protrusion at L4-5 with L5 > L4 signs and symptoms WILL be included. Those with predominantly degenerative stenosis, degenerative spondylolisthesis, or spondylolysis will be excluded.

Subjects also need to have an eleven point Likert pain scale score greater than or equal to four. They will not have a history of prior epidural steroid injections within the prior year or prior lumbar surgery. 2. Initial evaluation and study eligibility determination. 3. Presentation of study to patient and informed consent obtained 4. Baseline pain and outcome measures evaluation (VAS, SF-36, ODI, GPC, PSAQ, physical exam, work history, analgesic use log, and ancillary treatment log, lost productivity).

-Upon entry to the study, baseline measurements of the patient's pain and function will be established. The primary outcome measure for this study will be reduction in pain as measured by a three day average Visual Analog Scale (VAS). Secondary measures will include: Oswestry Disability Index (ODI), SF-36, a seven point Global Perception of Change (GPC), a three question Patient Specific Activity questionnaire (PSAQ) (each patient will list 3 cardinal activities of daily living that are restricted or rendered impossible because of their pain and will score each item), and utilization of analgesic, outside medical care, and surgical options, as well as physician physical exam test parameters and lost productivity. 5. Randomization to TFESI or PT group, if subject declines then inquire about enrolment in the observational cohort. Participants in this group (Cohort) will chose their treatment (per-protocol physical therapy, injections, or both) after consulting with their physicians. 6. Injection: Anesthetic/corticosteroid (per randomization); repeat 1-3 times if clinically indicated.

The following drugs will be used for this procedure: 80mg Depo-Medrol and 1% lidocaine.