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Transforaminal epidural steroid injections provide superior pain and disability relief compared to interlaminar techniquesSpecific steroid injections show better results for lower back pain

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Key Takeaway
Note that TFESI provides superior short-term pain and disability outcomes compared to ILESI in patients with lumbar radiculopathy.

This meta-analysis synthesized data from 31 studies involving 2,452 patients to compare transforaminal epidural steroid injection (TFESI), interlaminar epidural steroid injection (ILESI), caudal epidural steroid injection (CESI), and combined TFESI+CESI for the management of lumbar radiculopathy. The analysis focused on pain reduction and disability scores across various follow-up intervals ranging from 2 weeks to 12 months.

Findings indicate that TFESI resulted in significantly greater pain reduction compared to ILESI at 2 weeks and 1 month, with superior improvements in both disability and pain at 3 and 6 months. When comparing TFESI to CESI, TFESI showed superior disability improvements at 2 weeks, 1 month, and 12 months, while pain superiority was noted at 1 and 3 months but not at 12 months. The combined TFESI+CESI approach demonstrated significantly greater improvements in both disability and pain relief across all follow-up timepoints compared to TFESI alone.

Authors note that evidence for the specific benefits of the combined TFESI+CESI approach is limited, and more prospective randomized trials are required to define long-term outcomes. Clinical utility suggests TFESI provides superior short- and intermediate-term results over ILESI, while its superiority over CESI is inconsistent. The combined approach may offer additional benefits but requires further investigation.

How this fits prior evidence

This meta-analysis addresses a gap in comparing specific delivery techniques for lumbar radiculopathy management. While prior coverage has discussed the use of steroids in various conditions such as TB meningitis and kidney transplant, this study specifically evaluates the comparative efficacy of TFESI, ILESI, and CESI for lumbar radiculopathy pain and disability.

Living with lumbar radiculopathy means dealing with sharp, radiating pain that can make daily movement difficult. Doctors often use steroid injections to calm the nerves and reduce inflammation. However, not all injection techniques are the same, and choosing the right one matters for your recovery.

A review of 31 studies involving over 2,400 patients compared different methods. The results showed that transforaminal epidural steroid injections (TFESI) provided better pain relief and improved physical ability at several milestones compared to interlaminar injections. While TFESI also showed some advantages over caudal injections in the short term, those results were less consistent over a full year.

Combining two types of injections—TFESI and CESI—showed the most consistent improvements for both pain and disability across all follow-up times. Because the evidence for this combined approach is still limited, more large-scale trials are needed to confirm its long-term benefits. Talk to your doctor about which specific injection technique best fits your personal needs.

What this means for you:
Transforaminal steroid injections often provide better early pain relief than other common injection methods.

Common questions

Which injection method is most effective for my back pain?

The study found that transforaminal epidural steroid injections (TFESI) provided significantly better pain reduction and improved disability scores at 2 weeks, 1 month, 3 months, and 6 months compared to interlaminar injections. While it also showed some benefits over caudal injections, those results were less consistent over a full year.

Are there any benefits to combining different injection types?

Combining transforaminal (TFESI) and caudal (CESI) injections resulted in significantly greater improvements in both pain relief and disability across all follow-up timepoints. However, researchers note that evidence for this combined approach is still limited and needs more study.

How long do the benefits of these injections last?

The research tracked patients at 2 weeks, 1 month, 3 months, 6 months, and 12 months. While some methods showed better results in the first few months, the data for long-term outcomes—specifically beyond one year—is still being gathered to confirm which method works best over time.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedAug 2026
View Original Abstract ↓
IntroductionEpidural steroid injection (ESI) techniques have demonstrated effectiveness in improving short- and intermediate-term pain and disability outcomes; however, their efficacy may vary depending on the specific approach used. This meta-analysis aims to compare disability and pain outcomes among different ESI techniques - transforaminal (TFESI), interlaminar (ILESI), caudal (CESI), and combined approaches - in patients with lumbar radiculopathy.MethodsThe authors searched PubMed/MEDLINE, Scopus, and Cochrane from inception to December 16, 2025, in accordance with PRISMA guidelines. Studies comparing disability and pain outcomes between different ESIs were assessed. Random-effects meta-analyses were performed to estimate the pooled mean difference between treatment groups at different follow-up timepoints. Sensitivity analyses and publication bias assessments were conducted.ResultsIn total, 31 studies comprising 2,452 patients were included. Compared with ILESI, TFESI demonstrated significantly greater pain reduction at 2 weeks and 1 month of follow-up, as well as superior improvements in both disability and pain at 3 and 6 months. Compared with CESI, TFESI showed superior disability improvements at 2 weeks and 1 month, with pain outcomes remaining superior at 1 and 3 months; however, both disability and pain outcomes plateaued by 6 months. At 12-month follow-up, TFESI demonstrated improved disability scores compared with CESI, with no significant difference in pain outcomes. Across all follow-up timepoints, the combined TFESI + CESI approach was associated with significantly greater improvements in both disability and pain relief compared with TFESI alone.ConclusionsTFESI demonstrated superior short- and intermediate-term improvements in disability and pain compared with ILESI, but its advantages over CESI remained inconsistent. Limited evidence suggests that the combined TFESI + CESI approach may offer additional benefits over TFESI alone. Further prospective randomized trials are warranted to better define the efficacy and long-term outcomes of the combined approach.Systematic Review Registrationhttps://www.crd.york.ac.uk/PROSPERO/view/CRD420261320804
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