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Sciatica

79 citationsUpdated Sep 2026

Overview

Sciatica prognosis is complicated by study heterogeneity, making firm conclusions difficult to draw [1]. For patients referred to secondary care, the prognosis is generally poor and only slightly improved by surgery [3]. Most patients with lumbar disc herniation and severe sciatica exhibit swelling of the affected root within the dural tube, with a close relationship between symptom severity and this root swelling [2]. While evidence remains lacking regarding the optimal treatment for lumbar disc-induced sciatica [4], early surgery is cost-effective compared with nonoperative care for patients with chronic sciatica lasting 4 to 12 months [17]. In this specific cohort, surgical intervention resulted in greater pain reduction at 6 months than conservative treatment [9].

Management strategies vary based on clinical presentation and duration. Nerve-root injection is a valuable method for recurrent sciatica or when standard diagnostic methods fail [5]. Transforaminal epidural corticosteroids and local anesthetic are recommended for acute sciatica within the first few weeks if a clinically relevant outcome is achieved [11], although adding these injections to usual care is not cost-effective for acute sciatica less than 8 weeks from a societal perspective in a Dutch healthcare setting [46]. Platelet-rich plasma epidural injection is recommended for single-level lumbar herniated nucleus pulposus due to its efficacy and safety [38]. For sciatica caused by lumbar disc herniation, tubular discectomy offers functional outcomes similar to conventional microdiscectomy, though it shows less favorable results in patient-reported pain and recovery [16].

Comorbidity should be assessed in all patients with sciatica [3]. In adolescent spinal pain, well-indicated non-operative or operative management can alter the natural history and resolve pain that would otherwise become chronic and disabling in adulthood [21]. For Grade-III or IV isthmic spondylolisthesis, arthrodesis results in solid fusion and excellent relief of both back pain and sciatica [13]; however, lumbosacral fusion requires persistent, disabling pain unrelieved by non-surgical treatment and careful patient selection [44]. Intraspinal synovial cysts associated with sciatica showed complete resolution in all patients at follow-up ranging from eighteen to twenty-five months [8]. Current evidence is insufficient to draw firm conclusions regarding the relationship between inflammation and clinical symptoms [10], as no significant differences in serum levels of TNFα, IL-6 or other biomarkers were seen between patients with sciatica and those with back pain with referred leg pain [12].

Anatomy & Pathophysiology

Spinal Anatomy

The spinal column consists of 33 vertebrae divided into five distinct regions: cervical, thoracic, lumbar, sacral, and coccygeal [59]. Specifically, the column comprises 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal vertebrae [62]. The sacral and coccygeal vertebrae are fused, typically allowing for 24 mobile segments [62]. The bony anatomy includes 7 cervical, 12 thoracic, and 5 lumbar vertebrae, along with 5 fused sacral and 4 or 5 fused coccygeal vertebrae [54]. The length of the vertebral column averages 72 cm in men and is 7 to 10 cm less in women [62].

A typical vertebra comprises an anterior body and a posterior arch that enclose the vertebral canal [62]. The vertebral body consists of an inner region of cancellous bone surrounded by a thin shell of cortical bone [59]. The posterior arch is formed by the pedicle, facet, lamina, and spinous process [59]. The neural arch is composed of two pedicles laterally and two laminae posteriorly that are united to form the spinous process [62]. The vertebral body is connected by the pedicles to the posterior arch, which consists of the lamina and spinous process [54]. These structures create the spinal canal, bounded by the body anteriorly, lamina posteriorly, and pedicles laterally, through which the spinal cord passes [54]. The vertebral canal extends throughout the length of the column and provides protection for the spinal cord, conus medullaris, and cauda equina [62].

The intervertebral disc separates each successive vertebral body, except between the atlas (C1) and the axis (C2) [59]. The disc provides a combination of compressive stiffness and flexibility to support normal spine biomechanics [59]. It is composed of an inner nucleus pulposus and an outer ring termed the anulus fibrosus [59]. The nucleus pulposus serves as an osmotic pump to attract water and generate hydraulic pressure when subjected to significant loads [59]. The anulus fibrosus encapsulates the gelatinous nucleus pulposus and provides mechanical support to contain nucleus pulposus pressure and constrain intervertebral rotations [59]. The outer anulus fibrosus is integrated with the vertebral rim via a fibrocartilage enthesis that consists of a thin layer of calcified cartilage, or "tidemark" [59]. The cartilage end plate integrates with the inner anulus fibrosus to fully encapsulate the nucleus pulposus [59]. The end plate is a bilayer of cartilage and bone that separates the disc from adjacent vertebrae [59]. It must be strong and thick to resist significant loads but also permeable to favor chemical transport and disk cellular vitality [59].

Each successive vertebra is connected anteriorly via the intervertebral disc and posteriorly via the facet joints [59]. The basic motion segment of the spine, the functional spinal unit, consists of two vertebrae, the disk between them, and the facet joints and their capsules [58]. Vertebral bodies bear 70% to 90% of the static axial load of the spine [58]. The facet joints support 10% to 20% of axial load in a standing, neutral alignment [58]. In extension, facet joints may bear up to 30% of the axial load [58]. In flexion, facet joints may be burdened with up to 50% of the anterior shear load [58]. The intervertebral disk absorbs axial loads by deforming the nucleus pulposus, which redistributes axial forces radially [58]. The radial pressure generated by the nucleus pulposus is resisted by the tensile properties of the alternating bands of fibers within the anulus fibrosus [58].

The lumbar spine is composed of five vertebrae and assumes a lordotic curvature [59]. The lumbar spine has approximately 40° to 50° of lordosis [58]. The thoracic spine is composed of 12 vertebrae and assumes a kyphotic curvature [59]. The thoracic spine generally ranges from 20° to 40° of kyphosis [58]. The sacrum is kyphotic [58]. Kyphotic segments (thoracic, sacral) are considered "primary" curvatures present in utero and at birth [58]. The lordotic curvatures of the cervical and lumbar spine develop secondarily later in life to allow the growing child to develop an upright posture [58]. At the most cephalad extent, the cervical spine is composed of seven vertebrae and assumes a lordotic curvature [59]. Together, these regions give rise to the "S"-shaped characteristic curve of the spinal column [59]. The five, fused sacral vertebrae form a portion of the pelvis [59]. At the most caudal extent of the spinal column, four small, fused vertebrae form the coccyx [59].

The center of gravity of the spinal column runs from the odontoid process proximally through the sacral promontory caudally [58]. Changes in sagittal balance that shift the center of gravity too far ventrally can result in significant pain and disability [58]. The vertebral bodies function primarily to bear weight and transfer forces to the pelvis and hips [54]. The posterior elements provide protection to the neural structures and also function as a tension band [54].

Additional soft-tissue structures provide passive support, including the anterior longitudinal ligament, the posterior longitudinal ligament, the ligamentum flavum, the facet joint capsule, the interspinous ligament, and the supraspinous ligaments [59]. The spinal column is also stabilized by a set of paraspinal muscles that include the erector spinae, psoas, and multifidus [59]. The erector spinae runs longitudinally on the dorsal surface of the spinal column and functions to extend the spine [59]. The psoas runs longitudinally on the ventrolateral surface of the spinal column and serves to flex the hip (bilateral contraction) or laterally bend the trunk (unilateral contraction) [59]. The multifidus connects intersegmentally to stabilize the spine by acting like a bowstring to maintain lordosis [59].

The thoracic spine has the most variable anatomy and represents two transitional zones: from the highly mobile cervical spine into the more rigid thoracic region, then back to the more mobile lumbar spine [56]. The outstanding characteristic of the thoracic spine is its rigidity [56]. In conjunction with the ribs and the sternum, the thoracic region essentially forms a bony "cube," which is an inherently stable structure [56]. The vertebral bodies of the thoracic spine are larger than those of the cervical spine, but smaller than the lumbar vertebrae [56]. The posterior arch of thoracic vertebrae encloses the spinal canal, which is narrowest in this region of the spine [56]. The rib heads articulate with the lateral aspect of the vertebral bodies [56]. There is a shared articulation at the level of the disk space with the rib head articulating with the superolateral aspect of the vertebral body for which it is named and the inferior aspect of the level above [56]. The first, eleventh, and twelfth vertebral bodies have only a single articulation for the same-numbered rib head [56]. The transverse processes project obliquely superolaterally [56]. Along the ventral aspect of the transverse process is the costotransverse joint, the point at which the rib articulates with the same-numbered transverse process [56]. There is no costotransverse articulation at T11 or T12 [56]. The T11 and T12 levels represent a transitional zone to the lumbar spine, and their transverse processes are shorter and project more laterally than the levels above [56].

Vascular Anatomy

The thoracic and lumbar levels are supplied by paired segmental arteries which originate directly from the aorta along its posterior surface [63]. Branches of the segmental arteries supply the vertebral body, the paraspinal musculature, and the spinal cord [63]. The vascular supply of the spinal cord is primarily from the medullary branches of the segmental spinal arteries [63]. The anterior spinal artery is responsible for supplying approximately 80% of the vascular supply to the spinal cord [63]. The arteria medullaris magna (AMM), also known as the arteria radicularis magna or artery of Adamkiewicz, typically arises on the left side anywhere between the T8 and L1 level [63].

Nerve Anatomy

A typical mixed spinal nerve has three distinct components: motor, sensory, and sympathetic [64]. Several rootlets leave the anterolateral sulcus of the spinal cord and unite to form each motor root [64]. The fibers traversing these roots arise from the anterior horn cells and innervate the skeletal muscles [64]. The sensory fibers arise from pain, thermal, tactile, and stretch receptors [64]. Cell bodies for sensory fibers are located within the dorsal root ganglia with axons entering the posterolateral sulcus of the cord via several rootlets [64]. The fibers conveying joint or position sensibility and some tactile fibers turn cephalad in the dorsal columns and do not synapse before reaching the gracile and cuneate nuclei at the cervicomedullary junction [64]. Pain and temperature fibers synapse in the substantia gelatinosa and cross to ascend in the dorsal spinothalamic tract [64]. Tactile fibers enter, synapse, and cross to ascend in the ventral spinothalamic tract [64].

The sympathetic component of all 31 mixed spinal nerves leaves the spinal cord along only 14 motor roots [64]. The cells of origin for the sympathetic component are in the intermediolateral cell column that extends throughout the thoracic and upper lumbar cord segments [64]. The fibers exit from the cord with the 12 thoracic and first two lumbar motor roots, enter the respective mixed spinal nerve, and promptly emerge from it as white rami [64]. The white rami pass anteriorly to the corresponding sympathetic ganglion [64]. Synapse may occur within the ganglion with which the ramus is associated, and postganglionic fibers pass back to the mixed spinal nerve as a gray ramus [64]. More often, the fibers entering the ganglion via the white rami pass for variable distances up or down the paravertebral chain to synapse at higher or lower levels [64]. The postganglionic fibers pass along gray rami to cervical, lower lumbar, or sacrococcygeal mixed spinal nerves having no white rami [64]. Sweat glands, blood vessels, and erector pili are innervated also in a segmental pattern [64].

Mixed spinal nerves, having left the intervertebral foramina, receive their sympathetic component and promptly branch into anterior and posterior primary rami [64]. The posterior primary rami are directed posteriorly and supply the paraspinal musculature and the skin along the posterior aspect of the trunk, the neck, and the head [64]. The upper three cervical posterior rami are larger than their corresponding anterior rami, supplying relatively large areas of the scalp posteriorly and the musculature around the craniocervical junction [64]. With these exceptions, posterior primary rami are small, and the major part of each spinal nerve continues laterally in an anterior primary ramus to enter a plexus or to become an intercostal nerve [64]. Anterior primary rami of all the cervical, the first thoracic, and all the lumbosacral nerves join in the formation of plexuses [64]. The upper four cervical anterior rami form the cervical plexus [64]. The lower four cervical and first thoracic anterior rami form the brachial plexus [64]. The first three and a part of the fourth lumbar anterior rami form the lumbar plexus [64]. The sacral anterior rami along with the fifth lumbar and a part of the fourth join to form the lumbosacral plexus [64].

The area of skin supplied by the fibers of a single spinal root is called a dermatome [64]. Segmental dermatomal patterns are well preserved in the thoracic region but not in the limbs [64]. Migration of the limb buds accounts for the displacement of midcervical dermatomes along the lateral aspect of the arm and radial aspect of the forearm [64]. Migration of the limb buds accounts for the displacement of the lower cervical and upper thoracic dermatomes along the medial aspect of the arm and the ulnar aspect of the forearm [64]. Lumbar and sacral dermatomal alignment along the various aspects of the lower extremity is similarly explained by migration of the limb buds [64]. The line separating the more rostral segmental dermatomes from more caudal ones is called the axial line and may be followed into the spinal axis [64].

Peripheral nerves originate from the ventral rami of spinal nerves and are distributed via several plexuses (cervical, brachial, lumbosacral) [69]. Efferent (motor) fibers carry impulses from the central nervous system to muscles [69]. Afferent (sensory) fibers carry information toward the central nervous system [69]. Autonomic nerves control visceral structures and consist of parasympathetic (craniosacral) and sympathetic (thoracolumbar) divisions [69]. Preganglionic neurons of parasympathetic nerves arise in the nuclei of cranial nerves III, VII, IX, and X and in the S2, S3, and S4 segments of the spinal cord [69]. Preganglionic neurons in the sympathetic system are located in the spinal cord (T1–L3) [69]. Preganglionic neurons in the sympathetic system synapse in chain ganglia adjacent to spine and collateral ganglia along major abdominal blood vessels [69].

Pathophysiology of Sciatica

There is a close relationship between sciatica severity and root swelling in patients with lumbar disc herniation [2]. The classic lumbar disc syndrome is characterized by low-back pain and sciatica [19]. The typical history of the classic lumbar disc syndrome is dull, aching, low-back pain developing after a bending or lifting strain [19]. Pain in the buttock or lower extremity may develop at the same time as low-back pain, but this is unusual [19]. Sciatica generally develops later in the course of the acute episode and sometimes not at all during the initial or early attacks [19]. Sciatica is usually unilateral, but even when it is bilateral one limb is more painful than the other [19]. Occasionally the pain may alternate from one limb to the other [19]. Sciatica alone, without back pain, is unusual, occurring in only 1 per cent of all patients in the series reported by Lansche and Ford [19].

The distribution of the limb pain is often the same, whether the protrusion is at the fourth lumbar or the lumbosacral interspace [19]. The intensity of the pain seems to have no direct relationship to the size of the disc protrusion [19]. In the typical disc syndrome, the back pain is static or mechanical in nature [19]. Activity or use of the back aggravates back pain, and rest relieves it—at least partially [19]. It is unusual for the pain not to be intermittent, at least during the initial episode of the typical disc syndrome [19]. The reason for improvement with rest is not understood, but may be due to a decrease in edema of the nerve root, to adaptation of the root to its altered position, or to physiological compression of the root [19]. Sensory change in the foot, as manifested by paresthesias (or numbness as the patient describes it), is quite common in the typical disc syndrome [19]. There does not appear to be any experimental evidence showing that a herniated nucleus pulposus pressing on a lower lumbar-nerve root does in fact cause sciatica [33]. Inman and Saunders commented that the conception that sciatica is caused solely by pressure

Classification

Clinical Diagnosis and Examination

The accuracy of individual clinical index tests for predicting imaging findings of nerve root impingement in chronic lumbar radiculopathy is low in specialised care [26]. Clinicians' overall evaluation improves diagnostic accuracy slightly compared to these individual tests [26]. A detailed physical examination of the sciatic nerve is beneficial to avoid misdiagnosis when clinical symptoms and signs are inconsistent with imaging findings [15]. Nerve-root injection serves as a valuable method for evaluating the etiology of sciatica in patients with recurrent symptoms or when standard diagnostic methods fail [5]. Computerized axial tomographic scanning of the thighs and pelvis can help evaluate the cause of sciatica of an extraforaminal etiology [20].

Imaging and Biomarkers

Inflammatory biomarkers do not distinguish between patients with sciatica and referred leg pain within a primary care population [12]. Specifically, no significant differences in serum levels of TNFα, IL-6 or any other biomarkers were observed between patients with sciatica and those with back pain with referred leg pain in the ATLAS cohort [12]. T2-weighted magnetic resonance imaging texture analysis applied to the two lowest intervertebral discs (L4-L5 and L5-S1) achieved an accuracy of 83%, specificity of 83%, sensitivity of 82%, negative predictive value of 94%, precision of 56%, and receiver operating characteristic area-under-curve of 0.91 for classifying symptomatic versus asymptomatic cases [52]. MALDI-TOF-MS serum protein profiling findings benefit the diagnosis of chronic low back pain and the understanding of differences between different forms of discogenic low back pain [28].

Anatomical and Pathological Classification

Lee classification: Used to categorize the prolapsed type of lumbar disc herniation in clinical studies [102].

Modified classification for migrated lumbar disc herniation: Demonstrates good reliability, and the experience level of spine surgeons does not affect this reliability [49].

Modified system for grading intervertebral disc degeneration: Comprises 8 grades representing a progression from normal disc (Grade 1) to severe disc degeneration (Grade 8) [107].

Disc bulges: The classification term 'disc bulges' is a source of confusion and disagreement among many practitioners, although other commonly supported nomenclatures have strong interobserver reliability [27].

Most patients with herniation of a lumbar disc and severe sciatica had swelling of the affected root in the dural tube, with a close relationship between sciatica severity and root swelling [2]. There is no experimental evidence showing that a herniated nucleus pulposus pressing on a lower lumbar-nerve root causes sciatica [33]. Experimental evidence does not indicate that pressure alone upon the nerve root initiates pain of the characteristic type seen in sciatica [33].

Prognostic and Stratification Factors

The heterogeneity of available studies makes it difficult to draw firm conclusions about sciatica prognosis for non-surgically treated patients [1]. The prognosis for sciatica referred to secondary care is not that good and is only slightly better after surgery [3]. An algorithm has been developed to support clinical decisions regarding early referral for primary care patients with sciatica [7]. Key variables compared between patients with and without a clinical diagnosis of sciatica in the ATLAS cohort include age, gender, smoking, BMI, back and leg pain scores, disability, anxiety and depression, work interference, first ever episode, worse pain location, pain below knee, neuropathic pain score, sciatica bothersomeness index score, sleep disturbance, STarT Back tool score, and MRI findings [14].

Clinical Presentation

History and Symptom Characteristics

The classic lumbar disc syndrome typically presents with dull, aching low-back pain that develops following a bending or lifting strain [19]. In this typical presentation, back pain is static or mechanical in nature, aggravated by activity or use of the back, and relieved at least partially by rest [19]. It is unusual for this pain not to be intermittent during the initial episode [19]. Sciatica is usually unilateral; when bilateral, one limb is more painful than the other, and occasionally the pain may alternate from one limb to the other [19]. Sciatica occurring alone, without back pain, is unusual, reported in only 1 per cent of patients in the series by Lansche and Ford [19]. Sensory change in the foot, manifested by paresthesias or numbness, is quite common in the typical disc syndrome [19].

The distribution of limb pain is often the same whether the disc protrusion is at the fourth lumbar or the lumbosacral interspace [19]. Furthermore, the intensity of sciatic pain seems to have no direct relationship to the size of the disc protrusion [19].

Pathophysiology and Diagnostic Findings

Clinicians' overall evaluation improves diagnostic accuracy slightly for chronic lumbar radiculopathy [26]. In a sample of patients with lumbar disc herniation, a combination of clinical features predicted the presence or absence of histologically confirmed inflammation [40]. However, in a primary care cohort, no significant differences in serum levels of TNFα, IL-6 or any other biomarkers were seen between patients with sciatica and those with back pain with referred leg pain [12]. When clinical symptoms and signs are inconsistent with imaging findings, a detailed physical examination of the sciatic nerve is beneficial to avoid misdiagnosis [15].

Orthopaedic surgeons must distinguish lumbar radiculopathy from a myriad of mimicking pathologies, including musculoskeletal, neurogenic, immunogenic, and iatrogenic conditions [87]. Specific differential diagnoses include: * Nerve sheath tumors: Should be included in the differential diagnosis of neurogenic pain in the lower extremity [41]. * Atypical femoral fracture: Should be considered in older patients with lumbar canal stenosis who are undergoing long-term bisphosphonate therapy and present with thigh pain [39]. * Herpes zoster: Risk should be addressed whenever physicians encounter patients with sciatica [42].

Prognosis and Management Context

The heterogeneity of available studies makes it difficult to draw firm conclusions about sciatica prognosis [1].

Investigations

MRI: Magnetic resonance imaging is the procedure of choice for screening patients with low back or sciatic pain after routine radiography [74]. It has supplanted CT myelography for lumbar and thoracic spine evaluation because it is noninvasive and less expensive [74]. MRI provides ideal evaluation of intervertebral discs, nerve roots, the posterior longitudinal ligament, the intervertebral foramen, and the spinal cord [74]. It is superior to CT for identifying infections, tumors, and degenerative changes within discs [75], as well as for directly imaging neural structures and the nerve root in the foramen [75]. MRI is probably the diagnostic modality of choice when a lesion of the sciatic nerve is suspected [41].

MRI Sequences and Findings: Sagittal T2-weighted or gradient-echo images create a “myelographic” effect useful for evaluating subarachnoid space compromise [74]. Sagittal T1-weighted images should be examined to identify narrowing of the neuroforamina [74]. Far lateral disc herniations are best seen on selected axial images localized through disc levels [74]. Free disc fragments appear discontinuous with the intervertebral disc and usually have intermediate T1-weighted signal [74]. A positive MRI T2-weighted image of the lumbar disc with a high-intensity zone (HIZ) indicates disc degeneration and may be a specific indicator for the physical diagnosis of discogenic low back pain [122]. The presence of an HIZ on a lumbar MRI T2-weighted image indicates abnormal disc morphology [124].

MRI Interpretation and Limitations: MRI evidence of lumbar disc degeneration was found in 35% of patients aged 20 to 39 years and in 100% of patients older than 50 years [75]. MRI findings must be carefully correlated with the clinical impression because abnormal anatomy may be asymptomatic [75]. The specific location of an abnormality should be suspected before MRI and confirmed with the study [75]. MRI findings were not predictive of the development or duration of low-back pain in asymptomatic subjects [24]. The presence of a morphological variation from 'normal' in an imaging study does not confirm the diagnosis [72]. Imaging studies must be concordant with clinical symptoms and signs to be of diagnostic value [72]. An imaging study alone is insufficient to qualify for a DRE category, excepting spinal fractures [72].

CT: CT myelography is reserved for patients with contraindications to MRI or equivocal MRI examinations [74]. CT allows for identification of subtler fractures that might have remained undiagnosed on plain radiographs [77]. It provides additional three-dimensional detail, including the degree of canal compromise and the amount of fracture comminution [77]. The primary disadvantage of CT imaging in comparison to MRI is that it does not provide as good a visualization of the soft tissues [77].

Imaging Terminology: A bulge is a circumferential, symmetric extension of the disc beyond the interspace around the endplates [74]. A protrusion is a focal or asymmetric extension of the disc beyond the interspace, with the base against the disc of origin broader than any other dimension of the protrusion [74]. An extrusion is a more extreme extension of the disc beyond the interspace, with the base against the disc of origin narrower than the diameter of the extruding material itself or with no connection between the material and the disc of origin [74]. A sequestration specifically refers to a disc fragment that has completely separated from the disc of origin [74]. The classification term 'disc bulges' is a source of confusion and disagreement among many practitioners [27]. The most commonly supported nomenclatures for grading lumbar disc herniation and nerve root compression have strong interobserver reliability [27].

Laboratory: No significant differences in serum levels of TNFα, IL-6 or any other biomarkers were seen between patients with sciatica and those with back pain with referred leg pain in a primary care cohort [12].

Other Considerations: Negative discography in patients with probable symptoms of discogenic low back pain cannot absolutely exclude the diagnosis of discogenic pain [23]. Ultrasound imaging can be considered as a useful tool to detect changes in the sciatic nerve due to disc herniation [112]. Ascending lumbar venography was as accurate as myelography (86 per cent) in localizing herniation of a lumbar disc in surgically proved cases [133]. If the clinical picture warrants it, exploration of the lumbar canal should be done even though the myelogram is negative [125]. Venous varix compression of the sciatic nerve should be considered if there is lack of correlation between radiological findings and clinical picture or if there is a failure of response to treatment of assumed spinal etiology [117].

Treatment

Non-Operative

Conservative management for lumbar stenosis involves a general practitioner providing information, reviewing pain medication, advising patients to stay active and return to work, and prescribing physical therapy consisting of active exercises [94]. The physical therapy protocol includes education, stretching, strengthening, and conditioning exercises [94]. A maximum of 9 physical therapy sessions is allowed in the first 3 months of conservative management, with three additional booster sessions in the fourth, fifth, and sixth months [94]. The overall incidence of regression is 63% among non-surgically treated symptomatic lumbar disc herniation patients [45]. Most lumbar spine pathologies in recreational athletes can be managed nonsurgically with excellent outcomes [51]. Well-indicated non-operative or operative management can alter the natural history and resolve adolescent spinal pain which would become chronic and disabling in adulthood [21].

A combination of non-surgical spinal decompression therapy with routine physical therapy is more effective than routine physical therapy alone for improving pain, lumbar range of motion, back muscle endurance, functional disability, and physical role domain of quality of life in patients with lumbar radiculopathy following 4 weeks of treatment [110]. Non-surgical spinal decompression was associated with a reduction in pain and an increase in disc height [105]. Due to its efficacy and safety, platelet-rich plasma epidural injection is recommended in treating single level lumbar herniated nucleus pulposus [38]. However, no significant differences in pain and functional improvements were observed between platelet-rich plasma and corticosteroid groups at other follow-up time points for lumbar radicular pain [96]. Adding transforaminal epidural steroid injections (TESI) or transforaminal epidural injections (TEI) to usual care is not cost-effective compared to usual care in patients with acute sciatica lasting less than 8 weeks from a societal perspective in a Dutch healthcare setting [46]. A clinically relevant outcome in favor of transforaminal epidural steroid injections plus local anesthetic would imply it should be recommended for patients with acute sciatica within the first few weeks [11].

Operative

Indications: Surgical treatment is a viable option with good outcomes for recreational athletes who fail nonsurgical treatment or have neurological risk [51]. In the surgical treatment of lumbar-disc lesions, pain should be of sciatic nerve-root origin, persistent or recurrent, disabling, associated with neurological signs, and unrelieved by adequate non-surgical treatment [103]. Careful selection of patients for lumbosacral fusion is essential, requiring persistent, disabling pain unrelieved by non-surgical treatment [44].

Surgical Approach / Technique: At 2 years, microdiscectomy was superior to nonoperative care for the treatment of chronic sciatica resulting from an L4-L5 or L5-S1 disc herniation [32]. In patients with sciatica caused by lumbar disc herniation, tubular discectomy was not different from conventional microdiscectomy in functional outcomes and showed less favorable results in patient-reported pain and recovery [16]. Percutaneous endoscopic transforaminal discectomy and percutaneous endoscopic interlaminar discectomy have similar clinical efficacy in treating L5–S1 disc herniation [91].

Adjuncts: The addition of dynamic stabilization to decompression does not yield significant benefits for degenerative lumbar spondylolisthesis [43]. All arthrodeses for Grade-III or IV isthmic spondylolisthesis resulted in a solid fusion and excellent relief of both the back pain and the sciatica [13].

Other Considerations: Spine fusion for low backache and instability can be combined readily and effectively with removal of the nucleus pulposus [103]. The results of complete removal of the nucleus pulposus and degenerated portion of the disc combined with a Hibbs type of spine fusion should be good or excellent in a very high percentage of patients if cases are well selected, operations are done with skill and gentleness, and an appropriate postoperative regimen is followed [103]. The evidence for spinal fusion or disc replacement in non-specific low back pain is poor; spinal fusion should only be performed as part of a randomised controlled trial, and lumbar disc replacement should not be performed [111].

Prognosis and Outcomes

The prognosis for sciatica referred to secondary care is not that good and only slightly better after surgery [3]. For the entire group of patients in the Maine Lumbar Spine Society, the outcomes of operative management were superior to those of nonoperative management for sciatica due to lumbar disc herniation and spinal stenosis [30]. 81 percent of 209 patients who had had a disc excision reported that pain in the lower extremity was much better or gone compared with 56 percent of 165 patients who had been managed nonoperatively for a herniated lumbar disc [30]. Patients who had been operated on had an 11-point improvement in the Roland score compared with a 5-point improvement for the nonoperative group [30]. 78 percent of 65 operatively managed patients for spinal stenosis compared with 45 percent of 49 nonoperatively managed patients had a marked reduction in pain in the lower extremity [30]. 69 percent of 65 operatively managed patients for spinal stenosis compared with 36 percent of 39 nonoperatively managed patients reported that their overall result was very good or excellent [30]. At present, the heterogeneity of the available studies makes it difficult to draw firm conclusions about sciatica prognosis [1].

Diagnostic Considerations for Treatment

Nerve-root injection is a valuable method for patients with recurrent sciatica or when standard diagnostic methods fail [5].

Complications

Other Considerations: Long-term follow-up of cauda equina syndrome patients revealed that many continued to experience sexual issues, with a reported range of 14% to 100% [37]. In the context of sciatica caused by lumbar disc herniation, tubular discectomy showed less favorable results in patient-reported pain and recovery compared to conventional microdiscectomy [16]. Additionally, HZ vaccination should be considered especially for those aged over 50 with sciatica [42].

Recovery

Light activity (weeks): The evidence provided does not specify a typical week range for the resumption of desk work, driving, or light activities of daily living.

Full activity (months): The evidence provided does not specify a month range for the return to manual work, sport, or full range of motion and strength.

Complete recovery / outcome plateau (months): The evidence provided does not specify a month range for the stabilization of pain, strength, or final functional outcomes.

Rehabilitation protocol: The evidence provided does not detail specific physical therapy phasing, immobilisation duration, weight-bearing or range-of-motion progression, or sling/brace removal timing.

Functional milestones: Patient-reported outcomes improved from preoperative levels to short-term follow-up in adolescents and young adults undergoing lumbar disc herniation surgery [108]. No likely clinically important differences were observed between short- and long-term follow-up in this population [108]. For lumbar disc herniations treated with full-endoscopic interlaminar operation, 82% of patients reported no longer having leg pain, and 13% had only occasional pain [141]. Microdiscectomy was superior to nonoperative care for chronic sciatica resulting from an L4-L5 or L5-S1 disc herniation at 2 years [32]. Lumbar total disc replacement effectively results in pain relief and an improvement in quality of life at mid- to long-term follow-up [31].

Other Considerations: Tubular discectomy was not different from conventional microdiscectomy in functional outcomes for sciatica caused by lumbar disc herniation, although it showed less favorable results in patient-reported pain and recovery compared to conventional microdiscectomy [16]. Seven percent of lumbar disc patients had a residive lumbar disc operation within five years of their first operation [137]. The prognosis for intervertebral disc lesions in older children and adolescents is good, with nearly all patients recovering as a result of conservative treatment [142]. Most of the time acute Schmorl's node responds well to conservative treatment; however, rapid deterioration of symptoms or persistent severe pain should give suspicion of underlying secondary pathology [140]. Findings on magnetic resonance scans were not predictive of the development or duration of low-back pain [24]. The high-intensity zone (HIZ) sign indicated a part of the natural history of disc degeneration but was not an actual source of low back pain [48]. Signs of early disc degeneration related to tumor treatment can be seen in the intervertebral discs of radiotherapy-treated childhood brain tumor survivors [143].

Key Evidence

  • [L1] At present, the heterogeneity of the available studies makes it difficult to draw firm conclusions about sciatica prognosis, and highlights the need for further research for this group of patients. [1] (10.1186/1471-2474-12-208)
  • [L4] Most patients with herniation of a lumbar disc and severe sciatica had swelling of the affected root in the dural tube, with a close relationship between sciatica severity and root swelling. [2] (10.2106/00004623-198870030-00007)
  • [L2] The results indicate that the prognosis for sciatica referred to secondary care is not that good and only slightly better after surgery and that comorbidity should be assessed in patients with sciatica. [3] (10.1186/1471-2474-13-183)
  • [L2] Evidence is lacking concerning the optimal treatment of lumbar disc induced sciatica. [4] (10.1186/1471-2474-6-8)
  • [L2] Results from this trial will contribute to the evidence base for management of patients with sciatica consulting in primary care. [6] (10.1186/s12891-017-1513-5)
  • [L3] The study developed an algorithm to support clinical decisions regarding early referral for primary care patients with sciatica. [7] (10.1186/s12891-019-2686-x)
  • [L4] Follow-up ranging from eighteen to twenty-five months revealed complete resolution of the sciatica in all patients. [8] (10.2106/00004623-198567060-00006)
  • [L1] Patients who underwent surgery for sciatica lasting 4 to 12 months caused by lumbar disk herniation had a greater reduction in pain at 6 months than those who received conservative treatment. [9] (10.1056/nejmoa1912658)
  • [L1] Taking into account the overall risk of bias of the included studies there is insufficient evidence to draw firm conclusions regarding the relationship between inflammation and clinical symptoms in patients with sciatica. [10] (10.1186/s12891-019-2541-0)
  • [L2] A clinically relevant outcome in favor of TESI-plus would imply it should be recommended for patients with acute sciatica within the first few weeks. [11] (10.1186/s12891-017-1571-8)
  • [L3] In this cohort, no significant differences in serum levels of TNFα, IL-6 or any other biomarkers were seen between patients with sciatica and those with back pain with referred leg pain. [12] (10.1186/s12891-019-2604-2)
  • [L4] All of the arthrodeses resulted in a solid fusion and excellent relief of both the back pain and the sciatica. [13] (10.2106/00004623-198971010-00011)
  • [L4] [14] (10.1186/s12891-015-0787-8)
  • [L4] When clinical symptoms and signs are inconsistent with imaging findings, a detailed physical examination of the sciatic nerve is beneficial to avoid misdiagnosis. [15] (10.1186/s12891-021-04728-1)
  • [L1] In patients with sciatica caused by lumbar disc herniation, tubular discectomy was not different from conventional microdiscectomy in functional outcomes and showed less favorable results in patient-reported pain and recovery. [16] (10.2106/jbjs.9202.ebo443)
  • [L3] Early surgery is cost-effective compared with nonoperative care in patients who have had chronic sciatica for 4 to 12 months. [17] (10.1097/corr.0000000000002001)
  • [Case_report] Computerized axial tomographic scanning of the thighs and pelvis can be helpful in evaluating the cause of sciatica of an extraforaminal etiology. [20] (10.2106/00004623-198668090-00026)
  • [L4] Well-indicated non-operative or operative management can alter their natural history, and resolve adolescent spinal pain which would become chronic and disabling in adulthood. [21] (10.1016/j.otsr.2015.06.012)
  • [L2] Negative discography in patients with probable symptoms of discogenic low back pain cannot absolutely exclude the diagnosis of discogenic pain. [23] (10.1007/s00402-011-1448-5)
  • [L2] The findings on magnetic resonance scans were not predictive of the development or duration of low-back pain. [24] (10.2106/00004623-200109000-00002)
  • [L2] The accuracy of individual clinical index tests used to predict imaging findings of nerve root impingement in patients with chronic lumbar radiculopathy is low when applied in specialised care, but clinicians' overall evaluation improves diagnostic accuracy slightly. [26] (10.1186/1471-2474-14-206)
  • [L1] Although it appears that the most commonly supported nomenclatures have strong interobserver reliability, the classification term 'disc bulges' is a source of confusion and disagreement among many practitioners. [27] (10.1007/s11999-014-3674-y)
  • [L4] The findings benefit the diagnosis of chronic low back pain and the understanding of differences between different forms of discogenic low back pain. [28] (10.1186/1471-2474-15-193)
  • [L3] [30] (10.2106/00004623-199906000-00002)
  • [L1] This review shows that lumbar TDR effectively results in pain relief and an improvement in quality of life at mid- to long-term follow-up. [31] (10.1186/s13018-018-1032-6)
  • [L2] At 2 years, the present study showed that microdiscectomy was superior to nonoperative care for the treatment of chronic sciatica resulting from an L4-L5 or L5-S1 disc herniation. [32] (10.2106/jbjs.21.00448)
  • [L2] However, long-term follow-up of cauda equina syndrome patients revealed that many continued to experience sexual issues (14% to 100%). [37] (10.1186/s12891-025-08736-3)
  • [L1] Due to its efficacy and safety, the procedure is recommended in treating single level lumbar HNP. [38] (10.1186/s12891-023-06429-3)
  • [Case_report] Therefore, clinicians should consider AFF as a differential diagnosis in older patients with lumbar canal stenosis who are undergoing long-term bisphosphonate therapy and present with thigh pain. [39] (10.1186/s12891-022-05990-7)
  • [L3] In a sample of patients with lumbar DHR a combination of clinical features predicted the presence or absence of histologically confirmed inflammation. [40] (10.1186/s12891-020-03590-x)
  • [Case_report] Tumors of the nerve sheath should be included in the differential diagnosis of neurogenic pain in the lower extremity, and magnetic resonance imaging is probably the diagnostic modality of choice when a lesion of the sciatic nerve is suspected. [41] (10.2106/00004623-199304000-00016)
  • [L2] HZ risk should be addressed whenever physicians encounter patients with sciatica, and HZ vaccination should be considered especially for those aged over 50. [42] (10.1186/s12891-020-03847-5)
  • [L1] The addition of dynamic stabilization to decompression does not yield significant benefits. [43] (10.1186/s13018-025-06550-0)
  • [L1] The overall incidence of regression is 63% among non-surgically treated symptomatic lumbar disc herniation patients. [45] (10.1186/s12891-020-03548-z)
  • [L1] Adding TESI (or TEI) to usual care is not cost-effective compared to usual care in patients with acute sciatica (< 8 weeks) from a societal perspective in a Dutch healthcare setting. [46] (10.1186/s12891-024-07366-5)
  • [L4] Additional studies to identify patients who may ultimately fail nonoperative treatment and would benefit from early discectomy would be beneficial. [47] (10.1016/j.spinee.2010.02.005)
  • [L3] HIZ sign indicated a part of the natural history of disc degeneration but was not an actual source of low back pain. [48] (10.1186/s13018-018-1010-z)
  • [L3] The modified classification has good reliability and its experience level of spine surgeons does not affect the reliability. [49] (10.1186/s13018-023-03688-7)
  • [L5] Most lumbar spine pathologies in recreational athletes can be managed nonsurgically with excellent outcomes, while surgical treatment is a viable option with good outcomes for those who fail nonsurgical treatment or have neurological risk. [51] (10.5435/jaaos-d-24-00979)
  • [L4] Best classification results were observed applying texture analysis to the two lowest intervertebral discs (L4-L5 and L5-S1), with accuracy of 83%, specificity of 83%, sensitivity of 82%, negative predictive value of 94%, precision of 56%, and receiver operating characteristic area-under-curve of 0.91. [52] (10.1002/jor.24973)
  • [L5] Orthopaedic surgeons must distinguish lumbar radiculopathy from a myriad of mimicking pathologies, including musculoskeletal, neurogenic, immunogenic, and iatrogenic conditions, to avoid misdiagnosis and delays in appropriate care. [87] (10.5435/jaaos-23-01-7)
  • [L3] PEID and PETD have similar clinical efficacy in treating L5–S1 disc herniation. [91] (10.1186/s13018-024-04543-z)
  • [L2] [94] (10.1186/1471-2474-12-57)
  • [L1] Although no significant differences in pain and functional improvements were observed between the PRP and corticosteroid groups at other follow-up time points, future studies are needed to assess the efficacy and safety of PRP versus corticosteroid injections in treating lumbar radicular pain by standardizing PRP preparation, extending follow-up durations, and increasing sample sizes. [96] (10.1186/s13018-025-05725-z)
  • [L2] This document describes the protocol for a randomised controlled trial to assess the impact of activity restrictions on clinical outcomes following lumbar discectomy, aiming to provide an evidence base for postoperative care. [97] (10.1186/s12891-017-1681-3)
  • [L3] [102] (10.1186/s13018-026-06902-4)
  • [L3] Non-surgical spinal decompression was associated with a reduction in pain and an increase in disc height. [105] (10.1186/1471-2474-11-155)
  • [L3] [107] (10.1186/s12891-017-1522-4)
  • [L3] All patient-reported outcomes improved from preoperative to the short-term follow-up, while no likely clinically important differences between the short- and long-term follow-up were seen within both groups. [108] (10.1302/0301-620x.101b12.bjj-2019-0621.r1)
  • [L2] It was concluded that a combination of non-surgical spinal decompression therapy with routine physical therapy is more effective, statistically and clinically, than routine physical therapy alone in terms of improving pain, lumbar range of motion, back muscle endurance, functional disability, and physical role domain of quality of life, in patients with lumbar radiculopathy, following 4 weeks of treatment. [110] (10.1186/s12891-022-05196-x)
  • [L5] The evidence for spinal fusion or disc replacement in non-specific low back pain is poor; spinal fusion should only be performed as part of a randomised controlled trial, and lumbar disc replacement should not be performed. [111] (10.1302/0301-620x.99b8.bjj-2017-0199.r1)
  • [L3] Ultrasound imaging can be considered as a useful tool to detect changes in the sciatic nerve due to disc herniation. [112] (10.1186/s12891-019-2814-7)
  • [L5] It should be considered if there is lack of correlation between radiological findings and clinical picture or if there is a failure of response to treatment of assumed spinal etiology. [117] (10.1016/j.wneu.2018.06.058)
  • [L1] A positive MRI T2-weighted image of the lumbar disc with HIZ indicates disc degeneration and may be a specific indicator for the physical diagnosis of discogenic low back pain. [122] (10.1186/s13018-023-04187-5)
  • [L1] The presence of an HIZ on a lumbar MRI T2-weighted image indicates abnormal disc morphology. [124] (10.1186/s13018-017-0523-1)
  • [L4] If the clinical picture warrants it, exploration of the lumbar canal should be done even though the myelogram is negative. [125] (10.2106/00004623-196042020-00001)
  • [L3] Ascending lumbar venography was as accurate as myelography (86 per cent) in localizing herniation of a lumbar disc in surgically proved cases. [133] (10.2106/00004623-197759020-00003)
  • [L3] Seven percent of the lumbar disc patients had a residive lumbar disc operation within five years of their first operation. [137] (10.1186/1471-2474-8-2)
  • [Case_report] Most of the time acute Schmorl's node responds well to conservative treatment; however, rapid deterioration of symptoms or persistent severe pain should give suspicion of underlying secondary pathology. [140] (10.1186/s12891-020-03276-4)
  • [L2] The results show that 82% reported no longer having leg pain, and 13% had only occasional pain. [141] (10.1055/s-2006-932172)
  • [L4] Lesions of the lumbar intervertebral discs may occur in older children and adolescents; the prognosis is good, and nearly all of the patients recover as a result of conservative treatment. [142] (10.2106/00004623-195032010-00009)
  • [L3] Signs of early disc degeneration related to tumor treatment can be seen in the intervertebral discs of survivors. [143] (10.1186/s12891-023-06509-4)

See Also

References

[1] Prognostic factors in non-surgically treated sciatica: A systematic review. BMC Musculoskeletal Disorders. 2011. DOI: 10.1186/1471-2474-12-208

[2] Swelling of the cauda equina in patients who have herniation of a lumbar disc. A possible pathogenesis of sciatica.. The Journal of Bone & Joint Surgery. 1988. DOI: 10.2106/00004623-198870030-00007

[3] Prognostic factors for non-success in patients with sciatica and disc herniation. BMC Musculoskeletal Disorders. 2012. DOI: 10.1186/1471-2474-13-183

[4] Prolonged conservative treatment or 'early' surgery in sciatica caused by a lumbar disc herniation: rationale and design of a randomized trial [ISRCT 26872154]. BMC Musculoskeletal Disorders. 2005. DOI: 10.1186/1471-2474-6-8

[5] Nerve-Root Injection: A METHOD FOR EVALUATING THE ETIOLOGY OF SCIATICA.. The Journal of Bone and Joint Surgery. American Volume. 1974.

[6] The clinical and cost-effectiveness of stratified care for patients with sciatica: the SCOPiC randomised controlled trial protocol (ISRCTN75449581). BMC Musculoskeletal Disorders. 2017. DOI: 10.1186/s12891-017-1513-5

[7] Subgrouping patients with sciatica in primary care for matched care pathways: development of a subgrouping algorithm. BMC Musculoskeletal Disorders. 2019. DOI: 10.1186/s12891-019-2686-x

[8] Intraspinal synovial cyst causing sciatica.. The Journal of Bone & Joint Surgery. 1985. DOI: 10.2106/00004623-198567060-00006

[9] Surgery versus Conservative Care for Persistent Sciatica Lasting 4 to 12 Months. New England Journal of Medicine. 2020. DOI: 10.1056/nejmoa1912658

[10] Inflammatory biomarkers in patients with sciatica: a systematic review. BMC Musculoskeletal Disorders. 2019. DOI: 10.1186/s12891-019-2541-0

[11] Treatment of acute sciatica with transforaminal epidural corticosteroids and local anesthetic: design of a randomized controlled trial. BMC Musculoskeletal Disorders. 2017. DOI: 10.1186/s12891-017-1571-8

[12] Inflammatory biomarkers do not distinguish between patients with sciatica and referred leg pain within a primary care population: results from a nested study within the ATLAS cohort. BMC Musculoskeletal Disorders. 2019. DOI: 10.1186/s12891-019-2604-2

[13] In situ arthrodesis without decompression for Grade-III or IV isthmic spondylolisthesis in adults who have severe sciatica.. The Journal of Bone & Joint Surgery. 1989. DOI: 10.2106/00004623-198971010-00011

[14] Characteristics of patients with low back and leg pain seeking treatment in primary care: baseline results from the ATLAS cohort study. BMC Musculoskeletal Disorders. 2015. DOI: 10.1186/s12891-015-0787-8

[15] The diagnostic pitfalls of lumbar disc herniation---- malignant sciatic nerve tumour: two case reports and literature review. BMC Musculoskeletal Disorders. 2021. DOI: 10.1186/s12891-021-04728-1

[16] Tubular Discectomy Resulted in Greater Leg and Back Pain and a Lower Rate of Recovery Than Conventional Microdiscectomy for Sciatica. The Journal of Bone & Joint Surgery. 2010. DOI: 10.2106/jbjs.9202.ebo443

[17] Microdiscectomy Is More Cost-effective Than a 6-Month Nonsurgical Care Regimen for Chronic Radiculopathy. Clinical Orthopaedics & Related Research. 2021. DOI: 10.1097/corr.0000000000002001

[19] Low-Back Pain and Sciatica: Diagnosis and Indications for Treatment.. The Journal of Bone and Joint Surgery. American Volume. 1968.

[20] Sciatica from a sciatic neurilemoma. A case report and review of the literature.. The Journal of Bone & Joint Surgery. 1986. DOI: 10.2106/00004623-198668090-00026

[21] Adolescent spinal pain: The pediatric orthopedist's point of view. Orthopaedics & Traumatology: Surgery & Research. 2015. DOI: 10.1016/j.otsr.2015.06.012

[23] Diagnosis of discogenic low back pain in patients with probable symptoms but negative discography. Archives of Orthopaedic and Trauma Surgery. 2012. DOI: 10.1007/s00402-011-1448-5

[24] The Value of Magnetic Resonance Imaging of the Lumbar Spine to Predict Low-Back Pain in Asymptomatic Subjects. The Journal of Bone and Joint Surgery-American Volume. 2001. DOI: 10.2106/00004623-200109000-00002

[26] Accuracy of physical examination for chronic lumbar radiculopathy. BMC Musculoskeletal Disorders. 2013. DOI: 10.1186/1471-2474-14-206

[27] How Should We Grade Lumbar Disc Herniation and Nerve Root Compression? A Systematic Review. Clinical Orthopaedics & Related Research. 2015. DOI: 10.1007/s11999-014-3674-y

[28] MALDI-TOF-MS serum protein profiling for developing diagnostic models and identifying serum markers for discogenic low back pain. BMC Musculoskeletal Disorders. 2014. DOI: 10.1186/1471-2474-15-193

[30] Relationship Between Rates and Outcomes of Operative Treatment for Lumbar Disc Herniation and Spinal Stenosis. The Journal of Bone & Joint Surgery. 1999. DOI: 10.2106/00004623-199906000-00002

[31] Mid- to long-term results of total disc replacement for lumbar degenerative disc disease: a systematic review. Journal of Orthopaedic Surgery and Research. 2018. DOI: 10.1186/s13018-018-1032-6

[32] Discectomy Compared with Standardized Nonoperative Care for Chronic Sciatica Due to a Lumbar Disc Herniation. Journal of Bone and Joint Surgery. 2021. DOI: 10.2106/jbjs.21.00448

[33] Whilst the so-caned disc syndrome is a well established clinical entity there does not appear to be any experimental evidence showing that a herniated nucleus pulposus pressing on a lower lumbar-nerve root does in fact cause sciatica.. 1958.

[37] The implications of surgery on sexual dysfunction in patients with lumbar disc herniation with cauda equina syndrome: a systematic review. BMC Musculoskeletal Disorders. 2025. DOI: 10.1186/s12891-025-08736-3

[38] “Platelet-Rich Plasma” epidural injection an emerging strategy in lumbar disc herniation: a Randomized Controlled Trial. BMC Musculoskeletal Disorders. 2023. DOI: 10.1186/s12891-023-06429-3

[39] Atypical femoral fracture mimicking lumbar radiculopathy in two patients taking bisphosphonate long-term: A case report. BMC Musculoskeletal Disorders. 2022. DOI: 10.1186/s12891-022-05990-7

[40] Clinical features as predictors of histologically confirmed inflammation in patients with lumbar disc herniation with associated radiculopathy. BMC Musculoskeletal Disorders. 2020. DOI: 10.1186/s12891-020-03590-x

[41] Sciatica caused by a neurilemoma of the intrapelvic portion of the sciatic nerve. A case report.. The Journal of Bone & Joint Surgery. 1993. DOI: 10.2106/00004623-199304000-00016

[42] Herpes zoster in patients with sciatica. BMC Musculoskeletal Disorders. 2020. DOI: 10.1186/s12891-020-03847-5

[43] Decompression, decompression plus fusion and decompression plus dynamic stabilization for degenerative lumbar spondylolisthesis: a network meta-analysis. Journal of Orthopaedic Surgery and Research. 2025. DOI: 10.1186/s13018-025-06550-0

[44] Low Backache and Sciatica: Results of Surgical Treatment: PART I. SPINE FUSION ONLY.. The Journal of Bone and Joint Surgery. American Volume. 1964.

[45] The incidence of regression after the non-surgical treatment of symptomatic lumbar disc herniation: a systematic review and meta-analysis. BMC Musculoskeletal Disorders. 2020. DOI: 10.1186/s12891-020-03548-z

[46] Cost-effectiveness of Transforaminal epidural steroid injections for patients with ACUTE sciatica: a randomized controlled trial. BMC Musculoskeletal Disorders. 2024. DOI: 10.1186/s12891-024-07366-5

[47] Cost and use of conservative management of lumbar disc herniation before surgical discectomy. The Spine Journal. 2010. DOI: 10.1016/j.spinee.2010.02.005

[48] Factors associated with lumbar disc high-intensity zone (HIZ) on T2-weighted magnetic resonance image: a retrospective study of 3185 discs in 637 patients. Journal of Orthopaedic Surgery and Research. 2018. DOI: 10.1186/s13018-018-1010-z

[49] Independent reliability and availability analyses of modified classification for migrated lumbar disc herniation. Journal of Orthopaedic Surgery and Research. 2023. DOI: 10.1186/s13018-023-03688-7

[51] Lumbar Spine Injuries in Recreational Athletes: A Review. Journal of the American Academy of Orthopaedic Surgeons. 2025. DOI: 10.5435/jaaos-d-24-00979

[52] T2‐weighted magnetic resonance imaging texture as predictor of low back pain: A texture analysis‐based classification pipeline to symptomatic and asymptomatic cases. Journal of Orthopaedic Research. 2021. DOI: 10.1002/jor.24973

[54] Orthopaedic Knowledge Update 13 Ebook Without Multimedia. Spinal Anatomy > Osseous Anatomy.

[56] Orthopaedic Knowledge Update 13 Ebook Without Multimedia. Spinal Anatomy > Osseous Anatomy > Thoracic Vertebrae.

[58] Orthopaedic Knowledge Update 13 Ebook Without Multimedia. Spinal Anatomy > Biomechanics.

[59] Orthopaedic Basic Science Fifth Edition Print Ebook. Biology and Mechanics of the Skeletal Extracellular Matrix > Anatomy.

[62] Campbell S Operative Orthopaedics 4 Volume Set. RECONSTRUCTION OF THE PATELLOFEMORAL AND PATELLOTIBIAL LIGAMENTS WITH A SEMITENDINOSUS TENDON GRAFT > ANATOMY OF VERTEBRAL COLUMN.

[63] Orthopaedic Knowledge Update 13 Ebook Without Multimedia. Spinal Anatomy > Vascular Anatomy.

[64] Campbell S Operative Orthopaedics 4 Volume Set. PERIPHERAL NERVE INJURIES OF THE UPPER AND LOWER EXTREMITIES > ANATOMY OF THE SPINAL NERVES > COMPONENTS OF MIXED SPINAL NERVES.

[69] Miller S Review Of Orthopaedics. Genetics of musculoskeletal conditions and abnormalities are summarized in Table 1.27 > INTRODUCTION.

[72] Queensland Guidelines for Evaluation of Permanent Impairment, 2nd edition. Queensland Guidelines for Evaluation of Permanent Impairment, 2nd edition > Spine, p. 29.

[74] Campbell S Operative Orthopaedics 4 Volume Set. INTERVERTEBRAL DISC DISEASE.

[75] Campbell S Operative Orthopaedics 4 Volume Set. OVERVIEW OF LUMBAR AND THORACIC DISC DEGENERATION AND HERNIATION > MAGNETIC RESONANCE IMAGING.

[77] Rockwood And Green S Fractures In Adults. Imaging of Cervical Spine Fractures and Dislocations > Computed Tomography.

[87] Mimickers of Lumbar Radiculopathy. Journal of the American Academy of Orthopaedic Surgeons. 2015. DOI: 10.5435/jaaos-23-01-7

[91] Percutaneous endoscopic transforaminal vs. interlaminar discectomy for L5–S1 lumbar disc herniation: a retrospective propensity score matching study. Journal of Orthopaedic Surgery and Research. 2024. DOI: 10.1186/s13018-024-04543-z

[94] Design of the Verbiest trial: cost-effectiveness of surgery versus prolonged conservative treatment in patients with lumbar stenosis. BMC Musculoskeletal Disorders. 2011. DOI: 10.1186/1471-2474-12-57

[96] Therapeutic interventions of platelet-rich plasma versus corticosteroid injections for lumbar radicular pain: a systematic review and meta-analysis. Journal of Orthopaedic Surgery and Research. 2025. DOI: 10.1186/s13018-025-05725-z

[97] Lumbar microdiscectomy and post-operative activity restrictions: a protocol for a single blinded randomised controlled trial. BMC Musculoskeletal Disorders. 2017. DOI: 10.1186/s12891-017-1681-3

[102] A novel transparent visual channel translates into enhanced surgical safety and efficiency for prolapsed lumbar disc herniation: a comparative clinical study. Journal of Orthopaedic Surgery and Research. 2026. DOI: 10.1186/s13018-026-06902-4

[103] Low Backache and Sciatica: Results of Surgical Treatment: PART III. SURGICAL TREATMENT OF SPONDYLOLISTHESIS.. The Journal of Bone and Joint Surgery. American Volume. 1964.

[105] Restoration of disk height through non-surgical spinal decompression is associated with decreased discogenic low back pain: a retrospective cohort study. BMC Musculoskeletal Disorders. 2010. DOI: 10.1186/1471-2474-11-155

[107] Correlation between intervertebral disc degeneration, paraspinal muscle atrophy, and lumbar facet joints degeneration in patients with lumbar disc herniation. BMC Musculoskeletal Disorders. 2017. DOI: 10.1186/s12891-017-1522-4

[108] Lumbar disc herniation surgery in adolescents and young adults. The Bone & Joint Journal. 2019. DOI: 10.1302/0301-620x.101b12.bjj-2019-0621.r1

[110] Effects of non-surgical decompression therapy in addition to routine physical therapy on pain, range of motion, endurance, functional disability and quality of life versus routine physical therapy alone in patients with lumbar radiculopathy; a randomized controlled trial. BMC Musculoskeletal Disorders. 2022. DOI: 10.1186/s12891-022-05196-x

[111] The surgical treatment of non-specific low back pain. The Bone & Joint Journal. 2017. DOI: 10.1302/0301-620x.99b8.bjj-2017-0199.r1

[112] The relationship of the shear wave elastography findings of patients with unilateral lumbar disc herniation and clinical characteristics. BMC Musculoskeletal Disorders. 2019. DOI: 10.1186/s12891-019-2814-7

[117] Sciatica Caused by Venous Varix Compression of the Sciatic Nerve. World Neurosurgery. 2018. DOI: 10.1016/j.wneu.2018.06.058

[122] The correlation between the lumbar disc MRI high-intensity zone and discogenic low back pain: a systematic review and meta-analysis. Journal of Orthopaedic Surgery and Research. 2023. DOI: 10.1186/s13018-023-04187-5

[124] The correlation between the high-intensity zone on a T2-weighted MRI and positive outcomes of discography: a meta-analysis. Journal of Orthopaedic Surgery and Research. 2017. DOI: 10.1186/s13018-017-0523-1

[125] Correlation of the Myelogram with Clinical and Operative Findings in Lumbar Disc Lesions. The Journal of Bone & Joint Surgery. 1960. DOI: 10.2106/00004623-196042020-00001

[133] Ascending lumbar venography in lumbar-disc disease. The Journal of Bone & Joint Surgery. 1977. DOI: 10.2106/00004623-197759020-00003

[137] Reoperations after first lumbar disc herniation surgery; a special interest on residives during a 5-year follow-up. BMC Musculoskeletal Disorders. 2007. DOI: 10.1186/1471-2474-8-2

[140] Infected Schmorl’s node: a case report. BMC Musculoskeletal Disorders. 2020. DOI: 10.1186/s12891-020-03276-4

[141] A New Full-Endoscopic Technique for the Interlaminar Operation of Lumbar Disc Herniations Using 6-mm Endoscopes: Prospective 2-Year Results of 331 Patients. min - Minimally Invasive Neurosurgery. 2006. DOI: 10.1055/s-2006-932172

[142] INTERVERTEBRAL-DISC LESIONS IN CHILDREN AND ADOLESCENTS. The Journal of Bone & Joint Surgery. 1950. DOI: 10.2106/00004623-195032010-00009

[143] Early disc degeneration in radiotherapy-treated childhood brain tumor survivors. BMC Musculoskeletal Disorders. 2023. DOI: 10.1186/s12891-023-06509-4

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Creative Commons Attribution-NonCommercial 4.0 International Public License

By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-NonCommercial 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.

Section 1 -- Definitions.

a. Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.

b. Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.

c. Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.

d. Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.

e. Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.

f. Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License.

g. Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.

h. Licensor means the individual(s) or entity(ies) granting rights under this Public License.

i. NonCommercial means not primarily intended for or directed towards commercial advantage or monetary compensation. For purposes of this Public License, the exchange of the Licensed Material for other material subject to Copyright and Similar Rights by digital file-sharing or similar means is NonCommercial provided there is no payment of monetary compensation in connection with the exchange.

j. Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.

k. Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.

l. You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning.

Section 2 -- Scope.

a. License grant.

1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:

a. reproduce and Share the Licensed Material, in whole or in part, for NonCommercial purposes only; and

b. produce, reproduce, and Share Adapted Material for NonCommercial purposes only.

2. Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.

3. Term. The term of this Public License is specified in Section 6(a).

4. Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a) (4) never produces Adapted Material.

5. Downstream recipients.

a. Offer from the Licensor -- Licensed Material. Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.

b. No downstream restrictions. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.

6. No endorsement. Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).

b. Other rights.

1. Moral rights, such as the right of integrity, are not licensed under this Public License, nor are publicity, privacy, and/or other similar personality rights; however, to the extent possible, the Licensor waives and/or agrees not to assert any such rights held by the Licensor to the limited extent necessary to allow You to exercise the Licensed Rights, but not otherwise.

2. Patent and trademark rights are not licensed under this Public License.

3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties, including when the Licensed Material is used other than for NonCommercial purposes.

Section 3 -- License Conditions.

Your exercise of the Licensed Rights is expressly made subject to the following conditions.

a. Attribution.

1. If You Share the Licensed Material (including in modified form), You must:

a. retain the following if it is supplied by the Licensor with the Licensed Material:

i. identification of the creator(s) of the Licensed Material and any others designated to receive attribution, in any reasonable manner requested by the Licensor (including by pseudonym if designated);

ii. a copyright notice;

iii. a notice that refers to this Public License;

iv. a notice that refers to the disclaimer of warranties;

v. a URI or hyperlink to the Licensed Material to the extent reasonably practicable;

b. indicate if You modified the Licensed Material and retain an indication of any previous modifications; and

c. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.

2. You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.

3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.

4. If You Share Adapted Material You produce, the Adapter's License You apply must not prevent recipients of the Adapted Material from complying with this Public License.

Section 4 -- Sui Generis Database Rights.

Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:

a. for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database for NonCommercial purposes only;

b. if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material; and

c. You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.

For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.

Section 5 -- Disclaimer of Warranties and Limitation of Liability.

a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION, WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS, ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.

b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION, NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES, COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.

c. The disclaimer of warranties and limitation of liability provided above shall be interpreted in a manner that, to the extent possible, most closely approximates an absolute disclaimer and waiver of all liability.

Section 6 -- Term and Termination.

a. This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.

b. Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:

1. automatically as of the date the violation is cured, provided it is cured within 30 days of Your discovery of the violation; or

2. upon express reinstatement by the Licensor.

For the avoidance of doubt, this Section 6(b) does not affect any right the Licensor may have to seek remedies for Your violations of this Public License.

c. For the avoidance of doubt, the Licensor may also offer the Licensed Material under separate terms or conditions or stop distributing the Licensed Material at any time; however, doing so will not terminate this Public License.

d. Sections 1, 5, 6, 7, and 8 survive termination of this Public License.

Section 7 -- Other Terms and Conditions.

a. The Licensor shall not be bound by any additional or different terms or conditions communicated by You unless expressly agreed.

b. Any arrangements, understandings, or agreements regarding the Licensed Material not stated herein are separate from and independent of the terms and conditions of this Public License.

Section 8 -- Interpretation.

a. For the avoidance of doubt, this Public License does not, and shall not be interpreted to, reduce, limit, restrict, or impose conditions on any use of the Licensed Material that could lawfully be made without permission under this Public License.

b. To the extent possible, if any provision of this Public License is deemed unenforceable, it shall be automatically reformed to the minimum extent necessary to make it enforceable. If the provision cannot be reformed, it shall be severed from this Public License without affecting the enforceability of the remaining terms and conditions.

c. No term or condition of this Public License will be waived and no failure to comply consented to unless expressly agreed to by the Licensor.

d. Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.

Creative Commons is not a party to its public licenses. Notwithstanding, Creative Commons may elect to apply one of its public licenses to material it publishes and in those instances will be considered the “Licensor.” The text of the Creative Commons public licenses is dedicated to the public domain under the CC0 Public Domain Dedication. Except for the limited purpose of indicating that material is shared under a Creative Commons public license or as otherwise permitted by the Creative Commons policies published at creativecommons.org/policies, Creative Commons does not authorize the use of the trademark "Creative Commons" or any other trademark or logo of Creative Commons without its prior written consent including, without limitation, in connection with any unauthorized modifications to any of its public licenses or any other arrangements, understandings, or agreements concerning use of licensed material. For the avoidance of doubt, this paragraph does not form part of the public licenses.

Creative Commons may be contacted at creativecommons.org.