The story is familiar in interventional pain medicine: someone has a discectomy, laminectomy, or fusion, gets better for a while or never quite does, and months later is living with the same leg pain or a new band of back pain. They are told it is “scar tissue,” handed a longer opioid prescription, or offered a revision operation. What is often missing is the question of which of the several distinct problems under the “failed back surgery” umbrella is most likely generating the pain.
It is not one diagnosis — it is at least five
The single most useful reframe for post-laminectomy syndrome is to stop treating it as one disease. The current review literature breaks persistent pain after spine surgery into mechanistically separate categories, and each has its own diagnostic anchor and its own treatment [1].
Recurrent or residual disc herniation. A disc can re-herniate at the same level and side after a discectomy. Recurrence is estimated at around 5%. Risk factors include smoking, obesity, diabetes, younger age and male sex, and whether quitting smoking or losing weight after surgery prevents recurrence has not been tested in good trials [3]. This produces a return of the original radicular (leg) pain.
Adjacent-segment disease. After a fusion, the levels above and below carry more load and degenerate faster, producing new radicular pain from a new disc or foraminal narrowing [1].
Sacroiliac joint pain. Fusion to the sacrum shifts stress onto the sacroiliac joints [1]. In one series of 28 patients with persistent pain after lumbar fusion, diagnostic blocks pointed to the SI joint in 12, the most common single source [7]. The pain is felt in the buttock and back of the thigh and is tested with an SI joint block.
Epidural fibrosis. Scar tissue can tether a nerve root, producing persistent radicular pain. One review estimated it at up to 20-36% of failed back surgery syndrome [2]. It is seen on MRI with contrast, though scar is common after surgery whether or not it causes pain.
Wrong-level or technical failure, and complications. Sometimes the original procedure was done at the wrong level, or for a pain source (such as the SI joint) it was never going to fix. Sometimes a fragment was retained or a fusion did not heal. A minority develop arachnoiditis or a “battered root” [1]. These are distinct again.
The practical consequence: a treatment aimed at the wrong one of these is unlikely to help, which is one reason “failed back surgery syndrome,” treated as a single label, so often stays failed.
Why a second surgery usually isn’t the answer
The instinct after a surgery that didn’t work is another surgery. For many patients with post-laminectomy pain, that instinct deserves a second look. Revision in a scarred field carries a real risk of further nerve injury. For recurrent disc herniation, clinical outcomes and patient satisfaction after reoperation are worse than after the first discectomy, and fusion should be considered only for instability or deformity [3]. Some patients do need revision, and a recurrent disc pressing on a nerve root with weakness is a surgical problem. Before agreeing to revision for pain alone, a focused evaluation of the likely pain source is worth doing, because if the source is a facet joint, the SI joint or a scar-tethered nerve root, another operation on the disc or canal may not help.
How it’s diagnosed
Diagnosis combines the surgical history, a focused neurological exam, and targeted imaging — an MRI with contrast is what distinguishes recurrent disc from epidural fibrosis, since scar enhances with contrast and disc material does not [2]. But imaging rarely settles it alone, because post-surgical spines look abnormal whether or not they hurt. Diagnostic blocks add evidence: a medial branch block to test a facet joint, a sacroiliac joint block for buttock-dominant pain, and a selective nerve root block for radicular pain from scar or recurrent disc. A block that relieves the familiar pain makes that structure a likely source. It does not prove it, and it does not guarantee that the longer-term treatment will work.
Evidence-based treatment
Treatment follows the cause, and honest framing matters here because the evidence is uneven.
Conservative care and medication. Exercise, rehabilitation, manipulation and behavioral therapy have low-quality evidence in this group, and medicines have very little [1]. They are a reasonable foundation, not a solution.
Epidural steroid injections can help leg pain from an irritated nerve root in the short term. The 2007 ASIPP guideline rated the evidence as limited specifically for post-laminectomy syndrome [4], and a 2025 BMJ guideline panel recommended against epidural injections for chronic radicular pain lasting three months or more [8]. An epidural steroid injection makes the most sense when a nerve root is the likely source and the leg pain is recent or newly worse.
Percutaneous epidural adhesiolysis is aimed at epidural scar around a nerve root. Reviews by the American Society of Interventional Pain Physicians rated the evidence as Level I to II, based on three randomized trials, none published after 2006 [2][4]. A 2024 review concluded it “might be beneficial” [1].
Radiofrequency treatment. Radiofrequency ablation can treat facet joint pain after a positive medial branch block, in people who respond. Pulsed radiofrequency (PRF) of the dorsal root ganglion, which does not destroy the nerve, is used for radicular pain and “might be beneficial” in this group [1]. Modal Pain does not perform it, so it requires referral. For post-fusion SI joint pain, a sacroiliac joint injection comes first, and lateral branch radiofrequency ablation is an option when relief keeps fading.
Spinal cord stimulation — the honest version. SCS is the most-discussed option for refractory neuropathic leg pain after surgery, and the evidence cuts both ways. A multicenter randomized trial in patients with mainly back pain after surgery found that adding multicolumn SCS to medical management improved pain, function and quality of life, with gains reported at 12 and 24 months. The size of the benefit was modest: at six months, 13.6% of the stimulation group had at least 50% less back pain, against 4.6% with medical management alone, and 11.8% needed another operation for device problems [5]. A more recent placebo-controlled crossover trial in 50 patients with chronic radicular pain after lumbar surgery found no significant difference in disability between real burst stimulation and sham [6]. The reasonable reading is that stimulation helps some carefully selected patients, that a trial period before any permanent implant is essential, and that anyone promising a guaranteed result is overstating the evidence. Modal Pain does not implant stimulators. When a trial makes sense, it requires referral to an implanting specialist.
The thread through all of it: treat the most likely source, not the label.
When to see a specialist
See an interventional pain physician if back or leg pain has persisted beyond the expected recovery window after spine surgery, if it has returned after an initial improvement, or — especially — if you are being offered a revision operation before any diagnostic block has been done. Get the operative report from the index surgery and your prior imaging, and bring them. One caution overrides everything else: new leg weakness, numbness in the groin, or loss of bladder or bowel control after spine surgery is a surgical emergency. Call 911 or go to the nearest emergency room.
Verify your insurance covers a post-laminectomy syndrome workup Book a same-week evaluation
Or call (646) 290-6660.
For the broader framework on pain after surgery, see the post-surgical and iatrogenic nerve pain page.
References
This article is reviewed against the peer-reviewed literature. Citations retrieved from PubMed.
- van de Minkelis J, Peene L, Cohen SP, et al. Persistent spinal pain syndrome type 2. Pain Practice. 2024;24(7):919-936. doi:10.1111/papr.13379 · PubMed
- Epter RS, Helm S, Hayek SM, Benyamin RM, Smith HS, Abdi S. Systematic review of percutaneous adhesiolysis and management of chronic low back pain in post lumbar surgery syndrome. Pain Physician. 2009;12(2):361-78. PubMed
- Zileli M, Oertel J, Sharif S, Zygourakis C. Lumbar disc herniation: Prevention and treatment of recurrence: WFNS spine committee recommendations. World Neurosurgery: X. 2024;22:100275. doi:10.1016/j.wnsx.2024.100275 · PubMed
- Boswell MV, Trescot AM, Datta S, et al. Interventional techniques: evidence-based practice guidelines in the management of chronic spinal pain. Pain Physician. 2007;10(1):7-111. PubMed
- Rigoard P, Basu S, Desai M, et al. Multicolumn spinal cord stimulation for predominant back pain in failed back surgery syndrome patients: a multicenter randomized controlled trial. Pain. 2019;160(6):1410-1420. doi:10.1097/j.pain.0000000000001510 · PubMed
- Hara S, Andresen H, Solheim O, et al. Effect of Spinal Cord Burst Stimulation vs Placebo Stimulation on Disability in Patients With Chronic Radicular Pain After Lumbar Spine Surgery: A Randomized Clinical Trial. JAMA. 2022;328(15):1506-1514. doi:10.1001/jama.2022.18231 · PubMed
- DePalma MJ, Ketchum JM, Saullo TR. Etiology of chronic low back pain in patients having undergone lumbar fusion. Pain Medicine. 2011;12(5):732-9. doi:10.1111/j.1526-4637.2011.01098.x · PubMed
- Busse JW, Genevay S, Agarwal A, et al. Commonly used interventional procedures for non-cancer chronic spine pain: a clinical practice guideline. BMJ. 2025;388:e079970. doi:10.1136/bmj-2024-079970 · PubMed
Frequently Asked Questions
Post-laminectomy syndrome is chronic back and/or leg pain that persists or returns after spine surgery. It goes by several names — failed back surgery syndrome (FBSS) and, in the current classification, persistent spinal pain syndrome type 2. The name is a description, not a diagnosis: it tells you the pain continued after surgery, but not why. The 'why' is what matters, because persistent post-surgical spine pain is not one condition — it is several distinct problems that happen to share a starting point, and each one has a different treatment.
Usually because the original operation did not address the main pain source, or because it created or unmasked a new one. The recognized causes fall into a few groups. One is an inappropriate or wrong-level procedure. Another is a technical issue such as a retained disc fragment or a fusion that did not heal. Others are biomechanical effects like adjacent-segment disease or sacroiliac joint pain after a fusion, and complications such as excessive epidural fibrosis (scar around the nerve root) or arachnoiditis (van de Minkelis 2024). Recurrent disc herniation at the same level is another cause, after about 5% of disc operations (Zileli 2024). Sorting out which one is present is the whole task.
Scar tissue, meaning epidural fibrosis around a nerve root, is one real cause. One review put it at up to 20% to 36% of failed back surgery syndrome cases, an estimate rather than a measured rate (Epter 2009). It is not the whole story, and calling all persistent post-surgical pain 'just scar tissue' is the mistake that stalls treatment. Adjacent-segment disease, sacroiliac joint pain, recurrent disc and a wrong-level original procedure are treated differently. Scar shows up on MRI with contrast, though scar is common after surgery whether or not it hurts. When it seems to be the driver, epidural adhesiolysis is one option, with limited trial evidence.
Often not, at least not before the likely pain source has been identified. Revision surgery in a scarred field carries a real risk of further nerve injury. For recurrent disc herniation, outcomes and patient satisfaction after reoperation are worse than after the first operation, and fusion is reserved for instability or deformity (Zileli 2024). Some patients do need revision, especially with a recurrent disc compressing a nerve or a fusion that has not healed. The sensible first step is usually a focused evaluation, sometimes with diagnostic blocks, to work out whether a facet joint, the sacroiliac joint, a nerve root or an adjacent segment is the likely source.
There is no single best treatment, because the right one depends on the cause. Exercise, rehabilitation and behavioral therapy have low-quality evidence, and medicines have very little (van de Minkelis 2024). When a likely source is found, options include epidural steroid injections for leg pain from a nerve root, epidural adhesiolysis for scar around a nerve root, pulsed radiofrequency (PRF) of the dorsal root ganglion for radicular pain, which requires referral, radiofrequency ablation for facet joint pain after a positive medial branch block, and a sacroiliac joint injection when that joint is the source. A spinal cord stimulator trial, which requires referral to an implanting specialist, is an option for stubborn nerve pain in the leg, though its evidence is mixed.
Sometimes, but the evidence is mixed. In a multicenter randomized trial in patients with mainly back pain after surgery, 13.6% of those given spinal cord stimulation plus medical management had at least 50% less back pain at six months, against 4.6% with medical management alone, and 11.8% of the stimulation group needed another operation for device problems (Rigoard 2019). A placebo-controlled trial of 50 patients with leg pain after lumbar surgery found no difference in disability between real burst stimulation and sham (Hara 2022). A trial period before any permanent implant is essential. Modal Pain does not implant stimulators, so a trial requires referral to an implanting specialist.
Usually, if you have a commercial PPO plan. Modal Pain Management NYC accepts most commercial PPO plans, including Aetna, Anthem Blue Cross Blue Shield, Cigna, Empire Blue Cross Blue Shield, the Empire Plan, Oscar, Oxford, UMR and UnitedHealthcare, and does not accept Medicare, Medicaid, HMO plans, or workers' compensation. Diagnostic injections often need prior authorization, which our office handles. We verify your benefits before the first visit at no charge. Check your plan or call (646) 290-6660.
