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"Spine surgery"

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Degenerative

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Real-Time Location System Assessment of Early Postoperative Recovery After Lumbar Decompression According to Surgical Approach
Neurospine. 2026;23(2):459-472.   Published online April 30, 2026
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Real-Time Location System Assessment of Early Postoperative Recovery After Lumbar Decompression According to Surgical Approach
Neurospine. 2026;23(2):459-472.   Published online April 30, 2026
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Objective
To evaluate early postoperative mobility after lumbar decompression using real-time location system (RTLS)-derived objective metrics and to explore differences in mobility patterns between biportal endoscopic decompression and open decompression.
Methods
This retrospective cohort study included 323 patients who underwent lumbar decompression for degenerative lumbar spinal stenosis between March 2020 and May 2024. RTLS sensors embedded in wristbands continuously recorded patient mobility during postoperative days (PODs) 1–4. Primary RTLS-derived outcomes included total walking distance, mean walking speed, and active movement ratios (top 20% and top 50%). Between-group comparisons were performed using nonparametric tests. Propensity score matching and multivariable median quantile regression adjusting for age, American Society of Anesthesiologists physical status, and preoperative mobility were conducted.
Results
RTLS identified differences in early postoperative activity patterns between surgical approaches. In adjusted analyses, activity-intensity–based metrics, particularly the top 20% activity ratio, remained significantly higher in the biportal endoscopic decompression group across multiple PODs. Subgroup analyses demonstrated minimal differences after single-level decompression, whereas activity-based differences were more frequently observed in multilevel procedures.
Conclusion
RTLS-based continuous monitoring detected differences in early postoperative activity patterns following lumbar decompression. These findings support the role of RTLS as an objective tool for assessing early functional recovery in spine surgery.
  • 354 View
  • 17 Download

Clinical Study

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Radiographic Analysis of Endplate Coverage of a 3-Dimensional-Expandable Transforaminal Lumbar Interbody Fusion (TLIF) Implant Compared to Static TLIF and Anterior Lumbar Interbody Fusion Implants
Neurospine. 2025;22(4):891-901.   Published online December 31, 2025
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Radiographic Analysis of Endplate Coverage of a 3-Dimensional-Expandable Transforaminal Lumbar Interbody Fusion (TLIF) Implant Compared to Static TLIF and Anterior Lumbar Interbody Fusion Implants
Neurospine. 2025;22(4):891-901.   Published online December 31, 2025
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Objective
Transforaminal lumbar interbody fusion (TLIF) has become a mainstay technique for interbody fusion, allowing for large contact area between implant and endplate, and providing increased stability and greater area for fusion. The development of 3-dimensional (3D)-expandable implants that provide multidimensional (3D) expansion has shown to provide better height restoration and clinical outcomes when compared to static implants. Comparison of the endplate coverage between 3D-expandable and static TLIF implants has yet to be studied. This study compares endplate coverage achieved with static TLIF, 3D-expandable TLIF, and anterior lumbar interbody fusion (ALIF) implants.
Methods
A retrospective review of patients undergoing interbody fusion with either static TLIF, 3D-expandable TLIF, or ALIF between the years 2014 and 2022 was conducted. Postoperative computed tomography (CT) imaging was used to measure endplate and implant dimensions. 3D-expandable TLIF interbody device areas were calculated using diameter measurements on postoperative CT. The coverage ratio was defined as the ratio of twice the area of the implant and the sum of the superior and inferior endplate areas at the operative level.
Results
A total of 53 patients per cohort were included. The average endplate coverage ratios for static TLIF, 3D-expandable TLIF, and ALIF implants were 0.19±0.04, 0.35±0.06, and 0.46±0.13, respectively. Subgroup analysis showed comparable coverage of 3D-expandable TLIF to ALIF implants at L3–4 and L4–5, while ALIF remained superior at L5–S1.
Conclusion
3D-expandable TLIF interbody devices provide greater endplate coverage when compared to static TLIF devices and approach comparable coverage to ALIF implants.

Citations

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  • A Commentary on “Radiographic Analysis of Endplate Coverage of a 3-Dimensional-Expandable Transforaminal Lumbar Interbody Fusion (TLIF) Implant Compared to Static TLIF and Anterior Lumbar Interbody Fusion Implants”
    Kun Wang, Xiaofeng Lian
    Neurospine.2025; 22(4): 902.     CrossRef
  • From the Editor-in-Chief: Featured Articles in the December 2025 Issue
    Inbo Han
    Neurospine.2025; 22(4): 877.     CrossRef
  • 2,002 View
  • 67 Download
  • 2 Crossref

Minimally Invasive Surgery

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Real-Time Water Pressure Monitoring in Unilateral Biportal Endoscopic Spine Surgery
Neurospine. 2025;22(3):812-818.   Published online September 30, 2025
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Real-Time Water Pressure Monitoring in Unilateral Biportal Endoscopic Spine Surgery
Neurospine. 2025;22(3):812-818.   Published online September 30, 2025
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Objective
Unilateral biportal endoscopic (UBE) spine surgery is a minimally invasive technique that uses continuous irrigation to improve visualization and control bleeding. Effective water pressure management is crucial for patient safety, particularly at the cervical and thoracic levels where spinal cord injury risk is higher. However, real-time pressure monitoring remains underexplored. This study evaluates the impact of real-time water pressure monitoring on safety during UBE surgery.
Methods
A prospective study was conducted involving 20 patients undergoing UBE lumbar spine surgery. Patients were divided into 2 groups based on the irrigation system: gravity-based or infusion pump. Real-time water pressure was monitored using a digital sensor throughout surgery. Each procedure was categorized into 3 phases: phase I, working space preparation; phase II, laminectomy; phase III, flavectomy, dura exposure, and discectomy. Data was analyzed according to the type of irrigation system and surgical phase.
Results
The mean water pressure in the surgical field during UBE spine surgery was 17.98± 8.07 mmHg, with no significant differences between surgical phases. However, the infusion pump system maintained significantly lower mean pressure (12.10±3.51 mmHg) compared to the gravity-based system (23.86±6.97 mmHg, p=0.001). The infusion pump system consistently maintained a significantly lower mean water pressure compared to the gravity-based system.
Conclusion
Real-time water pressure monitoring during UBE surgery enhances safety by enabling improved control of pressure within the surgical field. Both the gravity-based and infusion pump systems safely maintained working space pressure, with the pump system showing significantly lower pressure levels.

Citations

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  • Case Report: Spinal epidural lipomatosis with incomplete cauda equina syndrome treated with unilateral biportal endoscopic technique
    Zaiyin Deng, Yujin Wang, Mohammed Saud Shaik, Duanyang Li, Rongjing Di, Zhourui Wu, Bin Ma
    Frontiers in Surgery.2026;[Epub]     CrossRef
  • Epidemiology of spinal cord hypertension syndrome in water-mediated uniportal full endoscopic thoracolumbar surgery: a single-center experience
    Haiyang Wu, Luyang Wang, Yiping Zheng, Xizhong Zhu, Wanqi Ren, Ziheng Li, Shoule Ma, Mingwang Zhao, Xingchen Li, Yusheng Xu
    European Spine Journal.2026;[Epub]     CrossRef
  • 6,381 View
  • 106 Download
  • 2 Web of Science
  • 2 Crossref

Review Article

Oncology

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Advances in Metastatic Disease Spinal Oncology: Novel Technology Without Forgetting the Fundamentals of Surgical Treatment
Neurospine. 2025;22(3):829-845.   Published online September 30, 2025
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Advances in Metastatic Disease Spinal Oncology: Novel Technology Without Forgetting the Fundamentals of Surgical Treatment
Neurospine. 2025;22(3):829-845.   Published online September 30, 2025
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Metastatic spine disease represents a growing therapeutic challenge that demands a balance between incorporating emerging technologies while respecting the fundamental principles during clinical decision-making. Advances in adjuvant therapies, including stereotactic body radiotherapy (SBRT) and chemotherapy, have significantly improved long-term patient survival. Surgical decision-making should be guided by well-established frameworks such as the NOMS (neurologic, oncologic, mechanical, systemic) criteria, the ESCC (epidural spinal cord compression) scale, and the SINS (spinal instability neoplastic score), ensuring a structured and evidence-based approach to treatment. The integration of minimally invasive techniques, including percutaneous instrumentation, ablation techniques, and biportal endoscopic approaches, has reduced surgical morbidity and facilitated faster recovery. Additionally, carbon fiber implants are revolutionizing spinal stabilization by allowing better postoperative visualization of any local recurrence and easier radiation planning. SBRT has emerged as a critical modality, offering precise, high-dose radiation with minimal toxicity to the spinal cord, improving local tumor control and patient outcomes. A multidisciplinary approach remains paramount, requiring collaboration between spine surgeons, radiation oncologists, and medical oncologists. In this narrative review, we aim to provide a comprehensive overview of the current state of metastatic spine tumor management, focusing on: (1) fundamentals of metastatic spine care, (2) minimally invasive surgical techniques, (3) the use of carbon fiber screws, (4) SBRT, and (5) ways to maximize patient safety.

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  • Neoplastic Cauda Equina Syndrome: When Do We Not Operate?
    Harsh Jain, Advith Sarikonda, Tamia Potter, Campbell Liles, Robert J. Dambrino, Ryan Whitaker, Scott L. Zuckerman
    Neurosurgery Practice.2026;[Epub]     CrossRef
  • 7,265 View
  • 69 Download
  • 1 Web of Science
  • 1 Crossref

Original Article

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Intra-, Epidural And Intracranial Pressure Changes During Interlaminar Endoscopy, With and Without Dural Tear
Neurospine. 2025;22(2):583-591.   Published online June 30, 2025
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Intra-, Epidural And Intracranial Pressure Changes During Interlaminar Endoscopy, With and Without Dural Tear
Neurospine. 2025;22(2):583-591.   Published online June 30, 2025
Close
Objective
Endoscopic spine surgery implies possibly severe complications of the central nervous system, from headache to seizures and autonomic dysreflexia. These adverse events might be due to increased intracranial pressure (ICP), presumably induced by increased spinal intra-/epidural pressure caused by fluid irrigation. This study was designed to perform interlaminar endoscopic lumbar discectomy (IELD) at different irrigation fluid settings while monitoring its effect on intra-/epidural and ICPs, with and without dural tears.
Methods
Spinal intradural pressures were measured by introducing catheters through a sacral approach to human cadavers’ lumbar, thoracic, and cervical levels. Additionally, an epidural probe was placed at L3–4. ICP was measured by an intraventricular probe. IELD was performed at L3–4, and the effect of varying irrigation pressures by different endoscopic pump systems and gravity-based irrigation on intra-/epidural and ICP pressures was measured before and after durotomy at L3–4.
Results
Intradural pressure at L3–4 correlated linearly with increasing irrigation pressure, irrespective of the used pump system (median pressure increase at 100-mmHg irrigation pressure: system I: 7 mmHg, r=0.94, p=0.002; system II: 7 mmHg, r=0.89, p=0.017) or gravity (8 mmHg, r=0.93, p=0.242). This effect was also seen intradurally at the thoracic/cervical spine, epidural, and intracranial level, and was even more pronounced with the maneuver of outflow-occlusion and a dural tear present.
Conclusion
While performing IELD, pump pressures correlated linearly to intra-/epidural pressures and ICPs. Pressures did not rise to concerningly high levels without outflow-occlusion, even with increased pump pressures. In the presence of a dural tear, higher pump pressures exacerbated by occlusion may lead to deleterious intradural and ICP elevations.

Citations

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  • Biportal endoscopic foraminotomy of the L7–S1 neuroforamen in dogs: Description of surgical technique and ex vivo comparison with conventional open dorsolateral foraminotomy
    Dimitrios Bekiaridis, Antonio Pozzi, Frank Steffen, Julian Guevar, Lucas A. Smolders
    Veterinary Surgery.2026;[Epub]     CrossRef
  • A Protocol to Preserve the Dural Safety Margin During Simultaneous Hybrid Lumbar Unilateral Biportal Endoscopy and Cervical Laminoplasty
    Karson Tam, H.Y. Li, H.K. Lo, W.L. Kam
    World Neurosurgery.2026; 209: 124877.     CrossRef
  • Epidemiology of spinal cord hypertension syndrome in water-mediated uniportal full endoscopic thoracolumbar surgery: a single-center experience
    Haiyang Wu, Luyang Wang, Yiping Zheng, Xizhong Zhu, Wanqi Ren, Ziheng Li, Shoule Ma, Mingwang Zhao, Xingchen Li, Yusheng Xu
    European Spine Journal.2026;[Epub]     CrossRef
  • Preliminary Report of Full-Endoscopic Spinal Dural Repair Using Double-Arm Sutures With a Biportal Endoscopic System: Technical Note and Feasibility Evaluation in an Ex Vivo Porcine Model
    Kuo-Hua Chao, Chiu-Ming Chen, Jui-Jung Yang
    Operative Neurosurgery.2025;[Epub]     CrossRef
  • 4,180 View
  • 154 Download
  • 3 Web of Science
  • 4 Crossref

Review Article

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Narrative Review on Postoperative Pain Management Following Spine Surgery
Neurospine. 2025;22(2):403-420.   Published online June 30, 2025
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Narrative Review on Postoperative Pain Management Following Spine Surgery
Neurospine. 2025;22(2):403-420.   Published online June 30, 2025
Close
Postoperative pain is an inevitable consequence of spine surgery, yet there remains no universal consensus on the optimal pain management strategy. The complexity of spine procedures, coupled with patient variability, necessitates a multifaceted approach to pain control. Over time, numerous strategies have emerged, each with varying levels of effectiveness. Pharmacological approaches, including multimodal analgesia, local anesthetic infusions, and gabapentinoids, provide relief for both acute and chronic pain. Additionally, perioperative strategies such as enhanced recovery after surgery (ERAS) protocols have demonstrated benefits in optimizing pain control and recovery outcomes. Beyond pharmacological interventions, physical therapy has become a cornerstone of postoperative pain management, aiding in functional recovery and reducing reliance on medications. For patients with refractory or chronic pain, neuromodulatory techniques such as spinal cord stimulation and intrathecal injections offer alternative solutions. Despite the breadth of evidence-based strategies available, limitations persist, including opioid dependence, the complexity of multimodal regimens leading to suboptimal compliance, and cases of refractory pain. These challenges underscore the importance of tailoring pain management approaches to individual patient needs, ensuring a balance between effectiveness and safety. This narrative review of evidence seeks to explore the multifaceted nature of pain management following spine surgery, highlighting the challenges and evolving strategies in optimizing patient outcomes.

Citations

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  • ERAS-guided matrix nursing pathway targeting risk factors in spine surgery: development and prospective evaluation
    Yanlan Ma, Jin Zhao, Jing Peng
    Frontiers in Medicine.2026;[Epub]     CrossRef
  • Ropivacaine-Dexamethasone vs. Ropivacaine-Magnesium Sulfate in TAP Block: A Randomized Study of Postoperative Analgesia in Lower Abdominal Surgeries
    Shah Mehndi Masih, Shashi Shekhar, Gurmukh Prasad
    International Journal of Science and Healthcare Research.2026; : 48.     CrossRef
  • Extracellular Vesicle-Based Biomarkers in Spinal Cord Injury: A State-of-the-Art Review on Diagnostic and Prognostic Advances
    Trung Nhan Vo, Hae Eun Shin, Yeji Kim, Inbo Han
    International Journal of Molecular Sciences.2026; 27(4): 2079.     CrossRef
  • Erector spinae plane block for postoperative analgesia in vertebral surgery: An updated meta-analysis of randomized controlled trials with trial sequential analysis and meta-regression
    Burhan Dost, Esra Turunc, Yunus Emre Karapinar, Muzeyyen Beldagli, Engin Ihsan Turan, Hilal Dokmeci, Alessandro De Cassai
    Journal of Clinical Anesthesia.2026; 111: 112184.     CrossRef
  • Liposomal Bupivacaine Infiltration and Postoperative Pain Outcomes in Lumbar Fusion: A Prospective Randomized Controlled Trial
    Shi-Jing Zhang, Xin Lu, Tian-Xiao Liu, Qing Liu, Yu-Bo Xie
    Journal of Pain Research.2026; Volume 19: 1.     CrossRef
  • Spinal cord stimulation versus medical therapy for post-laminectomy syndrome: Two- and five-year risks of systemic morbidity, reoperation, and death
    Muaz Wahid, Zuhair Zaidi, Syed Murtaza Kazmi, Sameer Sajjad, Yousef Alshaikhsalama, Isa Faghihi, Salah G. Aoun
    Journal of Orthopaedic Reports.2026; : 101006.     CrossRef
  • Treatment Options for Chronic Pain After Spine Surgery: A Systematic Review and Meta-Analysis of Interventional, Pharmacological, and Rehabilitative Strategies
    Alok G Belgaumkar, Neha T Gaidhankar, Pooja N. V.
    Cureus.2026;[Epub]     CrossRef
  • Analgesic-soaked acellular dermal matrix for postoperative pain control after endoscopic spine surgery: a retrospective chart review
    Doohun Hyun, Woo Min Park, Jung Hoon Park, Chai Min Yoo, Woo Joo Lee, Shih Min Lee, Cheol Wung Park
    Journal of Korean Society of Geriatric Neurosurgery.2025; 21(2): 68.     CrossRef
  • Perioperative Blood Pressure Optimization to Improve Outcomes in Orthopedic Patients: A Clinical Review
    Yu-fan Yang, Xiaqing Ma, Mudussar Ahmad, Paul Lee, Yibin Qin, Fu-hai Ji, Nazneen Sudhan, Ke Peng
    Therapeutics and Clinical Risk Management.2025; Volume 21: 1667.     CrossRef
  • 20,364 View
  • 302 Download
  • 5 Web of Science
  • 9 Crossref

Original Articles

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Preoperative Opioid Misuse Associations With Delayed Opioid Cessation, Pain, and Negative Affect After Spine Surgery
Neurospine. 2025;22(2):451-464.   Published online June 30, 2025
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Preoperative Opioid Misuse Associations With Delayed Opioid Cessation, Pain, and Negative Affect After Spine Surgery
Neurospine. 2025;22(2):451-464.   Published online June 30, 2025
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Objective
Preoperative opioid misuse is associated with worse postoperative outcomes. This prospective longitudinal cohort study evaluated the association between preoperative opioid misuse and prolonged pain and opioid use after elective spine surgery; and examined postoperative trajectories of patient-reported outcomes over one year.
Methods
Fifty-two patients undergoing elective spine surgery completed presurgical and weekly postoperative longitudinal assessments of pain and opioid use and monthly assessments of depression, anxiety, sleep disturbance, and physical function. Cox regression analyzed the effect of preoperative opioid misuse on time to pain and opioid cessation while linear mixed-effects models examined longitudinal changes in postoperative outcomes.
Results
Adjusting for age, sex, operative region, number of spinal levels, and any preoperative opioid use, preoperative opioid misuse (COMM-Positive) was associated with a delayed return to baseline opioid dose (hazard ratio [HR], 0.35; 95% confidence interval [CI], 0.14–0.88; p=0.02) and delayed opioid cessation (HR, 0.25; 95% CI, 0.09–0.59; p=0.008). All patients experienced comparable reductions in current and average pain intensity, and pain interference over time. COMM-Positive patients reported a normalization of postoperative anxiety and depression 1 month after surgery with a rebound at 3 months while patients without preoperative opioid misuse remained stable over time.
Conclusion
Preoperative opioid misuse is a significant risk factor for delayed opioid cessation even after adjusting for preoperative opioid use, and is associated with a transient normalization of anxiety and depressive symptoms with a rebound 3 months following spine surgery. Targeted screening and risk reduction strategies are needed for patients reporting preoperative opioid misuse before spine surgery.
  • 5,780 View
  • 75 Download

Epidemiology

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Rates, Causes, and Predictive Factors of Hospital Readmissions After Spine Surgery for Lumbar Spinal Stenosis: A Nationwide Retrospective Cohort Study
Neurospine. 2025;22(2):523-539.   Published online June 30, 2025
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Rates, Causes, and Predictive Factors of Hospital Readmissions After Spine Surgery for Lumbar Spinal Stenosis: A Nationwide Retrospective Cohort Study
Neurospine. 2025;22(2):523-539.   Published online June 30, 2025
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Objective
This study aimed to determine the rates, causes, and predictive factors of readmissions at different periods following spine surgery, up to 180 days.
Methods
This study utilized data from the 2018 to 2019 Nationwide Readmissions Database and included four postoperative periods: 0 to 7 days, 8 to 30 days, 31 to 90 days, and 91 to 180 days. The causes of readmissions and potential predictive factors were systematically identified. All analyses were performed for each period.
Results
For the 180,281 patients (mean age, 65.4 years) included, 2.4% were readmitted between 0 and 7 days, 3.5% between 8 and 30 days, 3.7% between 31 and 90 days, and 4.3% between 91 and 180 days (cumulative rates: 2.4%, 5.9%, 9.3%, and 12.1%, respectively). The causes of readmissions varied across different periods: surgical site-related causes predominated within the first 30 days, whereas nonsurgical site-related causes were more prevalent from 31 to 180 days; other surgical care complication (e.g., infection) was the most prevalent cause between 0 and 7 days (10.7%) and between 8 and 30 days (29.2%), while spondylopathies/spondyloarthropathy (e.g., spinal stenosis) were the leading causes between 31 and 90 days (12.6%) and between 91 and 180 days (17.5%). The predictive factors associated with readmissions also varied across different periods. For example, patients who underwent fusion was associated with a decreased risk of readmissions between 31 and 180 days (e.g., between 91 and 180 days: odds ratio [OR], 0.79; 95% confidence interval [CI], 0.72–0.86; p<0.001), rather than between 0 and 30 days (e.g., between 0 and 7 days: OR, 0.99; 95% CI, 0.90–1.08; p=0.81).
Conclusion
About 6% of patients with lumbar spinal stenosis who underwent spine surgery were readmitted within 30 days and 12% by 180 days. The causes of readmissions and predictive factors varied by period, providing valuable insights for quality improvement efforts and the burden of readmission reductions.

Citations

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  • Patients with primary thrombophilia on anticoagulation face increased mortality, thromboembolic events, and neurologic complications after laminectomy: a propensity-matched analysis
    Naasik Syed, Zuhair Zaidi, Muaz Wahid, Ronak Desai
    International Journal of Research in Orthopaedics.2026; 12(2): 314.     CrossRef
  • Frailty-Muscle Phenotypes Predict Outcomes After Lumbar Fusion in Adults Aged ≥75 Years: A Retrospective Cohort Study
    Ma Chao Guo, Xiangyu Li, Shuaikang Wang, Xiaolong Chen, Chao Kong, Yuxi Liu, Shibao Lu
    Neurospine.2026; 23(2): 242.     CrossRef
  • 9,678 View
  • 130 Download
  • 2 Crossref

Minimally Invasive Spine Surgery

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Distinct Recovery Patterns After Transforaminal Lumbar Interbody Fusion: Comparing Minimally Invasive and Open Approaches Using Mixed-Effects Segmented Regression
Neurospine. 2025;22(1):3-13.   Published online March 31, 2025
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Distinct Recovery Patterns After Transforaminal Lumbar Interbody Fusion: Comparing Minimally Invasive and Open Approaches Using Mixed-Effects Segmented Regression
Neurospine. 2025;22(1):3-13.   Published online March 31, 2025
Close
Objective
While minimally invasive-transforaminal lumbar interbody fusion (MIS-TLIF) has shown superiority in key clinical metrics over the open approach, evidence regarding patient-reported outcomes remains limited. This study compared postoperative recovery trajectories and symptomatic improvement phases between MIS and open TLIF.
Methods
This retrospective review included patients who underwent single-level MIS or open TLIF. Oswestry Disability Index (ODI) and Numerical Rating Scale (NRS) for back and leg pain were collected preoperatively and postoperatively. Segmented regression analysis with mixed-effects modeling, allowing for identification of distinct recovery phases, compared symptomatic trends between approaches.
Results
Of 324 patients (268 MIS, 56 open), baseline demographics were similar except for greater preoperative leg pain in the MIS group (NRS: 6.0 vs. 5.0, p = 0.027). A segmented regression model identified 4 ODI recovery phases: postoperative disability phase (PDP, day 0 to 13), early improvement phase (day 13 to 28), late improvement phase (day 28 to 110), and plateau phase (later than day 110). The MIS group exhibited significantly lower disability exacerbation during PDP (β = 0.93 vs. 1.42 points per day, p = 0.008). Additionally, the plateau of NRS back occurred significantly earlier in the MIS group than in the open group (MIS, 26.7 ± 2.6 days vs. open, 51.7 ± 6.6 days, p < 0.001).
Conclusion
MIS-TLIF resulted in lower postoperative disability during the first 2 weeks compared to the open approach. Furthermore, low back pain achieved an earlier plateau in back pain by about 4 weeks in the MIS approach.

Citations

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  • Multifidus Muscle Atrophy Predicts Spinal Cage Subsidence After Lumbar Fusion
    Cong Zhang, Chengming Li, Xiaotao Wu, Xiaozhi Sun
    Journal of Pain Research.2026; Volume 19: 1.     CrossRef
  • Biomaterials and Noncoding RNA: The “Repair‐Alliance” Perspective in Intervertebral Disc Degeneration
    Chen Liu, Zhengguang Li, Yongbo Zhang, Tianyi Ji, Hua Sun, Gen Wei, Liang Zhang, Juqun Xi
    Advanced Healthcare Materials.2026;[Epub]     CrossRef
  • Modified Integrated Health State Suggests Lower Cumulative Neck Pain–Related Disability After Cervical Disk Replacement Compared With Anterior Cervical Diskectomy and Fusion
    Tomoyuki Asada, Adin M. Ehrlich, Sereen Halayqeh, Eric R. Zhao, Adrian T. H. Lui, Andrea Pezzi, Austin C. Kaidi, Kasra Araghi, Vishaal Nayagam, Roger Freeman, Olivia C. Tuma, Tarek Harhash, Harvinder S. Sandhu, Todd J. Albert, Han Jo Kim, James C. Farmer,
    Neurosurgery.2026;[Epub]     CrossRef
  • Efficacy of low-dose Escherichia coli-derived recombinant human bone morphogenetic protein-2 in minimally invasive transforaminal lumbar interbody fusion
    Tae Hoon Kang, Jeongwoon Han, Minjoon Cho, Jae Hyup Lee
    European Spine Journal.2025;[Epub]     CrossRef
  • 6,925 View
  • 206 Download
  • 4 Web of Science
  • 4 Crossref

Minimally Invasive Spine Surgery

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Far-Lateral Transforaminal Unilateral Biportal Endoscopic Lumbar Discectomy for Upper Lumbar Disc Herniations
Neurospine. 2025;22(1):14-27.   Published online March 31, 2025
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Far-Lateral Transforaminal Unilateral Biportal Endoscopic Lumbar Discectomy for Upper Lumbar Disc Herniations
Neurospine. 2025;22(1):14-27.   Published online March 31, 2025
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Objective
The upper lumbar region has distinctive anatomical characteristics that contribute to the challenges of performing discectomy. We introduce far-lateral transforaminal unilateral biportal endoscopic (UBE) lumbar discectomy for central or paracentral disc herniations in the upper lumbar region.
Methods
We conducted retrospective review of the patients who underwent a far-lateral transforaminal UBE lumbar discectomy at our institution from January 2018 to September 2024. The electronic medical records, operative records, and radiologic images of the patients were reviewed.
Results
A total of 27 patients underwent far-lateral transforaminal UBE lumbar discectomy for central or paracentral disc herniations in the upper lumbar region. The patient had a mean age of 54.0 ± 13.7 years. Operation was performed at the L1–2 level in 3 patients (11.1%), L2–3 in 9 patients (33.3%), and L3–4 in 15 patients (55.6%). The patients were followed-up for a mean of 27.7 ± 19.3 months. The Oswestry Disability Index was significantly decreased from 36.3 ± 6.8 preoperatively to 3.7 ± 3.3 at last follow-up (p < 0.001). The visual analogue scale (VAS) back was significantly decreased from 7.8 ± 0.9 preoperatively to 3.1 ± 0.6 postoperative day 2 (p < 0.001). The VAS leg was significantly decreased from 8.1 ± 0.8 preoperatively to 2.3 ± 0.7 postoperative day 2 (p < 0.001).
Conclusion
The far-lateral transforaminal UBE lumbar discectomy would be a viable surgical option for upper lumbar disc herniations.

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  • Unilateral Biportal Endoscopic Transforaminal Lumbar Interbody Fusion (TLIF) Using 3-Dimensional-Printed Titanium Cages Compared With Open TLIF: A Comparison of Clinical Outcomes and Fusion Rates
    Sang Hyub Lee, Junghan Seo, Dain Jeong, Sang Youp Han, Dong Hyun Lee, Jae-Won Jang, Dong-Geun Lee, Choon Keun Park
    Journal of Minimally Invasive Spine Surgery and Technique.2026; 11(Suppl 1): S28.     CrossRef
  • The efficacy and safety of annulus fibrosus suture as adjuvant therapy for lumbar disc herniation: a systematic review and meta-analysis
    Wensi Ouyang, Guimei Guo, Yu Sun, Haobo Jiang, Long Chen, Shaofeng Yang
    Frontiers in Bioengineering and Biotechnology.2026;[Epub]     CrossRef
  • Nerve Root Herniation Due to Delayed Dural Tear Following Unilateral Laminotomy for Bilateral Decompression With Lumbar Discectomy Using Unilateral Biportal Endoscopy
    Sang Hyub Lee, Jae-Won Jang, Yong Eun Cho, Choon Keun Park
    Journal of Minimally Invasive Spine Surgery and Technique.2026; 11(Suppl 1): S109.     CrossRef
  • Application of the far-lateral approach in uni-portal non-coaxial spinal endoscopic surgery: an evidence-based and Delphi consensus approach among Chinese expert opinions
    Mengchen Yin, Yongpeng Lin, Pengfei Yu, Dong Wang, Fengtao Li, Shiyuan Hao, Kening Sun, Kuankuan Li, Yun Liu, Xin Zhang, Jizheng Li, Mingfei Wang, Junming Ma, Wenlong Yu, Li Xue, Zhilin Li, Guodong Gao, Bo Zhang, Benhui Xu, Jing Feng, Chao Chen, Yiguo Yan
    Brain and Spine.2026; 6: 105994.     CrossRef
  • The influence of the positional relationship between the pedicle and the pars interarticularis on unilateral biportal endoscopy: A retrospective cohort study
    Shaoning Shen, Tingyuan Lai, Hao Wei, Wangnan Mao, Lianguo Wu, Hanbing Zeng
    Medicine.2026; 105(12): e47945.     CrossRef
  • Comparison of short-term clinical efficacy between percutaneous endoscopic transforaminal discectomy and unilateral biportal endoscopy in the treatment of upper lumbar disc herniation
    Jing Zhang, Zhinan Ren, Lei Yu, Cheng Peng, Yingjie Hao
    BMC Musculoskeletal Disorders.2026;[Epub]     CrossRef
  • Incidence and Risk Factors for 30- and 90-day Reoperations Following Biportal Endoscopic Lumbar Discectomy for Single-Level Lumbar Disc Herniations
    Sang Hyub Lee, Jae-Won Jang, Hangyu Lee, Limjoon Yoon, Sejin Song, Dain Jeong, Junghan Seo, Sang Youp Han, Bang-Sang Hahn, Jun Young Kim, Jin Seop Hwang, Dong-Geun Lee, Jin-Sung Kim, Dong Chan Lee, Yong Eun Cho, Choon Keun Park
    Global Spine Journal.2026;[Epub]     CrossRef
  • Bilateral–Contralateral Endoscopic Decompression as a Fusion-Deferral Strategy in Upper Lumbar Stenosis: A Structural Rationale and Conditional Framework—A Technical Note with Cases Review
    Dong Hyun Lee, Sang Yeop Han, Seung Young Jeong, Il-Tae Jang
    Journal of Clinical Medicine.2025; 14(16): 5726.     CrossRef
  • 10,991 View
  • 475 Download
  • 9 Web of Science
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Transforaminal Endoscopic Thoracic Discectomy Is More Cost-Effective Than Microdiscectomy for Symptomatic Disc Herniations
Neurospine. 2025;22(1):118-127.   Published online March 31, 2025
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Transforaminal Endoscopic Thoracic Discectomy Is More Cost-Effective Than Microdiscectomy for Symptomatic Disc Herniations
Neurospine. 2025;22(1):118-127.   Published online March 31, 2025
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Objective
To analyze costs and cost-effectiveness of transforaminal endoscopic thoracic discectomy (TETD) for the treatment of symptomatic thoracic disc herniation (TDH) and compare it with open microdiscectomy (MD).
Methods
This retrospective cohort study included patients who underwent TETD or MD for symptomatic TDH and had a minimum follow-up of 1 year. Cost analysis included direct costs (primary and secondary hospital costs), indirect costs (lost wages due to work absence), total costs (direct + indirect), and cost-effectiveness (cost per quality-adjusted life year [QALY] and incremental cost-effectiveness ratio [ICER]). Clinical outcomes included patient-reported outcome measures (Oswestry Disability Index [ODI], 36-item Short Form health survey [SF-36]), QALY gained, and reoperation and readmission rates at 1 year. TETD and MD groups were compared for outcome measures.
Results
A total of 111 patients (57 TETD, 54 MD) were included. The direct ($6,270 TETD vs. $7,410 MD, p < 0.01), indirect costs ($1,250 TETD vs. $1,450 MD, p < 0.01), total costs ($7,520 TETD vs. $8,860 MD, p < 0.01), and cost per QALY ($31,333 TETD vs. $44,300 MD, p < 0.01) were significantly lower for TETD compared to MD. ICER of TETD was found to be -$33,500. At 1 year, TETD group showed significantly greater improvement in ODI (46% vs. 36%, p < 0.01) and SF-36 (64% vs. 53%, p < 0.01) and significantly greater QALY gained (0.24 vs. 0.2, p < 0.01) compared to MD group. No significant difference was found in reoperation and readmission rates.
Conclusion
TETD demonstrated significantly better clinical outcomes, lower overall costs, and better cost-effectiveness than MD in appropriately selected patients of symptomatic TDH.

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  • Editorial: Beyond the Portal Wars—Forging a New Consensus in Endoscopic Spine Surgery
    Jin-Sung Kim, Piya Chavalparit
    Global Spine Journal.2026; 16(1): 9.     CrossRef
  • Uniportal Endoscopic Surgery for Thoracolumbar Junction Disc Herniation in a Patient With Myelopathy: A Technical Note and Surgical Video
    Kang Suk Moon, Michel Gustavo Mondragón-Soto, Pedro Leonardo Villanueva-Solórzano
    Journal of Minimally Invasive Spine Surgery and Technique.2026; 11(1): 155.     CrossRef
  • 6,664 View
  • 192 Download
  • 2 Web of Science
  • 2 Crossref

Review Articles

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The Utilization of Navigation and Emerging Technologies With Endoscopic Spine Surgery: A Narrative Review
Neurospine. 2025;22(1):105-117.   Published online March 31, 2025
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The Utilization of Navigation and Emerging Technologies With Endoscopic Spine Surgery: A Narrative Review
Neurospine. 2025;22(1):105-117.   Published online March 31, 2025
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Endoscopic spine surgery (ESS) is growing in popularity worldwide. An expanding body of literature demonstrates rapid functional recovery with reduced morbidity compared to open techniques. Both full endoscopic spine surgery, or uniportal endoscopy, and unilateral biportal endoscopy (UBE) can be employed in conjunction with various navigation and enabling technologies for assistance with localization of anatomic orientation and assessment of the intraoperative target spinal pathology. This review article describes various navigation technologies in ESS, including 2-dimensional (2D) fluoroscopic imaging, 2D fluoroscopic navigation, 3-dimensional C-arm navigation, augmented reality, and spinal robotics. Employment of enabling navigation and emerging technology with the registration of patient-specific anatomy enables clear delineation of anatomic landmarks and facilitation of a successful procedure. Additionally, avoidance of common pitfalls during use of navigation systems in ESS is discussed in this review.

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  • Lumbar spinal stenosis: current concept of management
    Ji-Won Kwon, Kyung-Soo Suk, Seong-Hwan Moon, Si-Young Park, Namhoo Kim, Sub-Ri Park, Jae-Won Shin, Hak-Sun Kim, Byung Ho Lee
    Asian Spine Journal.2026; 20(1): 143.     CrossRef
  • Delta large-channel endoscopy versus unilateral biportal endoscopy for cervicothoracic junction disc herniation: a prospective randomized controlled trial
    Huaibin Wang, Hui Li, Rushuo Wei, Hao Yan, Ruzhan Yao, Weiqiang Liu, Ling Li
    Journal of Orthopaedic Surgery and Research.2026;[Epub]     CrossRef
  • Intraoperative Dual-Cantilever Probe for Rapid Measurement of Cancellous Bone Compressive Strength Within the Vertebral Body
    Owen Kresse, Evelyn Khong, Gerhardus O. Loohuis, R. Elayne Shelby, Maxwell Boakye, Michael J. Voor, Stuart J. Williams
    Journal of Medical Devices.2026;[Epub]     CrossRef
  • Assisted full-endoscopic spine surgery for lumbar spinal stenosis: Technical note and learning curve
    Koichiro Ono, Daisuke Fukuhara, Yuka Yamami, Yushi Yamaguchi, Kazuma Miura, Yuki Kasuga, Kaichi Sato, Satoshi Takamoto, Naoya Takabayshi, Hiroshi Kawaguchi, Makoto Hirao
    Brain and Spine.2026; 6: 105935.     CrossRef
  • Thoracic Full-Endoscopic Decompression for Ossification of Ligamentum Flavum (OLF) Causing Myelopathy
    Rohit A. Thaker, Smit Kagathara, Pratik Shah
    Indian Spine Journal.2026; 9(1): 112.     CrossRef
  • Real-time Three-dimensional Navigation in Spine Surgery: Is It the Game Changer?
    Shailesh Hadgaonkar, Siddharth Aiyer, Abhinav Bhute, Parag Sancheti
    Indian Spine Journal.2026; 9(1): 37.     CrossRef
  • A retrospective Chinese study on optical–electromagnetic navigation-guided biportal endoscopic unilateral laminotomy for bilateral decompression in lumbar spinal stenosis: improving precision and efficiency
    Xingchen Yao, Junpeng Liu, Li Guan, Jincai Yang, Aixing Pan, Yong Hai
    Asian Spine Journal.2026;[Epub]     CrossRef
  • Robotic-Assisted Uniportal Full-Endoscopic Transforaminal Lumbar Interbody Fusion: A Technical Note on a Hybrid Form of Minimally Invasive Surgery
    Ting Yao Ang, A. Aravin Kumar, Chin Hong Ngai, John J.Y. Zhang, Jacob Y.L. Oh, Ji Min Ling, Thomas C.H. Tan
    Journal of Minimally Invasive Spine Surgery and Technique.2026; 11(1): 105.     CrossRef
  • O‐Arm Navigation Enhances Facet Preservation Without Compromising Clinical Outcomes in UBE Decompression for Radiographically Stable Adult Degenerative Scoliosis: A Single‐Center Comparative Study
    Yi Liu, Yiwei Xie, Zhibao Chen, Ruijun Xu, Haojie Chen, Xiaojian Ye, Jiangming Yu
    Orthopaedic Surgery.2026;[Epub]     CrossRef
  • Full-endoscopic extraforaminal lumbar discectomy: Use of 3-D image-guidance can mitigate risks and overcome steep learning curve
    Anwesha Dubey, Abhijith R. Bathini, Katherine Anastasi, Joshua Bakhsheshian
    Journal of Clinical Neuroscience.2025; 139: 111455.     CrossRef
  • Navigated Uniportal Endoscopic Decompression for Thoracic Myelopathy Secondary to Ossified Yellow Ligament: A Report of Two Cases
    Bing Wui Ng, Ozlan Izma Muhamed Kamil
    Cureus.2025;[Epub]     CrossRef
  • 10,588 View
  • 247 Download
  • 9 Web of Science
  • 11 Crossref

Artificial Intelligence

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The Ever-Evolving Regulatory Landscape Concerning Development and Clinical Application of Machine Intelligence: Practical Consequences for Spine Artificial Intelligence Research
Neurospine. 2025;22(1):134-143.   Published online March 31, 2025
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The Ever-Evolving Regulatory Landscape Concerning Development and Clinical Application of Machine Intelligence: Practical Consequences for Spine Artificial Intelligence Research
Neurospine. 2025;22(1):134-143.   Published online March 31, 2025
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This paper analyzes the regulatory frameworks for artificial intelligence/machine learning AI/ML-enabled medical devices in the European Union (EU), the United States (US), and the Republic of Korea, with a focus on applications in spine surgery. The aim is to provide guidance for developers and researchers navigating regulatory pathways. A review of current literature, regulatory documents, and legislative frameworks was conducted. Key differences in regulatory bodies, risk classification, submission requirements, and approval pathways for AI/ML medical devices were examined in the EU, US, and Republic of Korea. The EU AI Act (2024) establishes a risk-based framework, requiring regulatory review based on device risk, with high-risk devices subject to stricter oversight. The US applies a more flexible approach, allowing multiple submission pathways and incorporating a focus on continuous learning. The Republic of Korea emphasizes possibilities of streamlined approval and with growing use of real-world data to support validation. Developers must ensure regulatory alignment early in the development process, focusing on key aspects like dataset quality, transparency, and continuous monitoring. Across all regions, the need for technical documentation, quality management systems, and bias mitigation are essential for approval. Developers are encouraged to adopt adaptable strategies to comply with evolving regulatory standards, ensuring models remain transparent, fair, and reliable. The EU’s comprehensive AI Act enforces stricter oversight, while the US and Korea offer more flexible pathways. Developers of spine surgery AI/ML devices must tailor development strategies to align with regional regulations, emphasizing transparent development, quality assurance, and postmarket monitoring to ensure approval success.

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  • Artificial intelligence in spine surgery: a scoping review
    Anis Choucha, Morgane Evin, Matteo de Simone, Guillaume Dannhoff, Henry Dufour, Valentin Avinens, Kaissar Farah, Florian Saby, Stephane Fuentes
    Neurochirurgie.2026; 72(1): 101764.     CrossRef
  • Applications of Raman Spectroscopy in Pandemic Virology: A Comprehensive Review
    Hulya Yilmaz, Anuradha Ramoji, Andreea Winterfeld, Hamideh Salehi, Aykut Ozkul, Jürgen Popp
    ACS Photonics.2026; 13(6): 1568.     CrossRef
  • Current Applications and Future Directions of Technologies Used in Adult Deformity Surgery for Personalized Alignment: A Narrative Review
    Janet Hsu, Taikhoom M. Dahodwala, Noel O. Akioyamen, Evan Mostafa, Rami Z. AbuQubo, Xiuyi Alexander Yang, Priya K. Singh, Daniel C. Berman, Rafael De la Garza Ramos, Yaroslav Gelfand, Saikiran G. Murthy, Jonathan D. Krystal, Ananth S. Eleswarapu, Mitchell
    Journal of Personalized Medicine.2025; 15(10): 480.     CrossRef
  • 7,153 View
  • 620 Download
  • 2 Web of Science
  • 3 Crossref

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Clinical Outcomes and Patient Perspectives in Full Endoscopic Cervical Surgery: A Systematic Review
Neurospine. 2025;22(1):81-104.   Published online March 31, 2025
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Clinical Outcomes and Patient Perspectives in Full Endoscopic Cervical Surgery: A Systematic Review
Neurospine. 2025;22(1):81-104.   Published online March 31, 2025
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Objective
Full endoscopic cervical surgery (FECS) is an evolving minimally invasive approach for treating cervical spine disorders. This systematic review synthesizes current evidence on the clinical outcomes and patient perspectives associated with FECS, specifically evaluating its safety, efficacy, and overall patient satisfaction.
Methods
A systematic search of the PubMed/MEDLINE, Cochrane Library, Embase, and Web of Science databases was conducted following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Studies published between January 2000 and September 2024 that reported on clinical outcomes or patient perspectives related to FECS were included. Risk of bias was assessed using the ROBINS-I (Risk Of Bias In Non-randomized Studies - of Interventions) tool and the Cochrane Risk of Bias tool. Inclusion criteria encompassed randomized controlled trials, prospective cohort studies, retrospective studies, and observational studies focused on adult populations undergoing FECS for cervical spine surgery.
Results
The final synthesis included 30 studies. FECS was associated with significant reductions in both cervical and radicular pain, as well as meaningful functional improvements, measured by standardized clinical scales such as the Neck Disability Index and visual analogue scale. Patient satisfaction rates were consistently high, with most studies reporting satisfaction exceeding 85%. Complication rates were low, primarily involving transient neurological deficits that were typically resolved without the need for further intervention. Nonrandomized studies generally presented a moderate risk of bias due to confounding and selection, whereas randomized controlled trials exhibited a low risk of bias.
Conclusion
FECS is a safe and effective minimally invasive surgical option for cervical spine disorders associated with substantial pain relief, functional improvement and high levels of patient satisfaction.

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  • Response to the letter to the editor: Inconsistencies in obesity criteria: implications for systematic reviews on endoscopic spine surgery
    Wongthawat Liawrungrueang, Watcharaporn Cholamjiak, Peem Sarasombath, Yudha Mathan Sakti, Pang Hung Wu, Meng-Huang Wu, Yu-Jen Lu, Lo Cho Yau, Zenya Ito, Sung Tan Cho, Dong-Gune Chang, Kang Taek Lim
    Asian Spine Journal.2026; 20(1): 211.     CrossRef
  • Full-Endoscopic Posterior Cervical Foraminotomy and Discectomy for Cervical Disc Hernia With Unilateral Radiculopathy
    Idris Gurpinar, Mehmet Yigit Akgun, Furkan Almas, Ozkan Ates
    Journal of Minimally Invasive Spine Surgery and Technique.2026; 11(1): 149.     CrossRef
  • Current Trends and Future Directions in Lumbar Spine Surgery: A Review of Emerging Techniques and Evolving Management Paradigms
    Gianluca Galieri, Vittorio Orlando, Roberto Altieri, Manlio Barbarisi, Alessandro Olivi, Giovanni Sabatino, Giuseppe La Rocca
    Journal of Clinical Medicine.2025; 14(10): 3390.     CrossRef
  • Navigated Minimally Invasive Cervical and Cervicothoracic Fixation: A Technical Note on Surgical Technique and Proposed Classification
    Spyridon Komaitis, Konstantinos Zygogiannis, Sotirios Karatzoglou, Dimitrios Klitsinikos, Dritan Pasku, Khalid Salem
    Cureus.2025;[Epub]     CrossRef
  • 12,461 View
  • 205 Download
  • 3 Web of Science
  • 4 Crossref

Original Article

Degenerative Spinal Diseases

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Open Versus Minimally Invasive Spine Surgery in the Treatment of Single-Level Degenerative Lumbar Spondylolisthesis: An AO Spine Global Cross-Sectional Study
Neurospine. 2025;22(1):40-47.   Published online March 31, 2025
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Open Versus Minimally Invasive Spine Surgery in the Treatment of Single-Level Degenerative Lumbar Spondylolisthesis: An AO Spine Global Cross-Sectional Study
Neurospine. 2025;22(1):40-47.   Published online March 31, 2025
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Objective
This study aims to assess global trends in the use of open surgery versus minimally invasive surgery (MIS) for the treatment of single-level L4–5 degenerative lumbar spondylolisthesis (DLS).
Methods
A cross-sectional online survey issued by the AO Spine Knowledge Forum Degenerative was conducted among AO Spine members between July and September 2023. Participants were presented with 3 clinical cases of L4–5 grade 1 DLS, each with varying degrees of stenosis and instability. The survey captured surgeon demographics and preferences for open versus MIS approaches. Statistical analysis, including chi-square tests and logistic regression, was performed to explore associations between surgical choices and surgeon demographics.
Results
A total of 943 surgeons responded, with 479 completing the survey. Open surgery was the preferred approach in all 3 cases (58.8%, 57.3%, and 42.4%, respectively), particularly in cases involving central and bilateral foraminal stenosis. MIS was the second most common choice, particularly for unilateral foraminal stenosis with mild instability (38.8%). Surgeons’ preferences varied significantly by region, age, and fellowship training, with younger and fellowship-trained surgeons more likely to prefer MIS.
Conclusion
The study highlights the continued predominance of open surgery for DLS, especially in complex cases, despite the growing acceptance of MIS. Significant regional and demographic variations in surgical preferences suggest the need for tailored guidelines and standardized training protocols to optimize patient outcomes. Future research should focus on the long-term efficacy of these approaches and the impact of evolving technologies on surgical decision-making.

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  • Minimally Invasive Options for Spondylolisthesis
    Chibuikem A. Ikwuegbuenyi, Mousa Hamad, Ibrahim Hussain, Roger Härtl
    Neurosurgery Clinics of North America.2026; 37(1): 39.     CrossRef
  • Long-term comparative study of Open-TLIF, MIS-TLIF, and UBE-TLIF in single-level degenerative lumbar spondylolisthesis
    Jian Luo, Lihua Shen, Changshen Bao, Zhichao Gao
    European Journal of Medical Research.2026;[Epub]     CrossRef
  • Current Trends and Future Directions in Lumbar Spine Surgery: A Review of Emerging Techniques and Evolving Management Paradigms
    Gianluca Galieri, Vittorio Orlando, Roberto Altieri, Manlio Barbarisi, Alessandro Olivi, Giovanni Sabatino, Giuseppe La Rocca
    Journal of Clinical Medicine.2025; 14(10): 3390.     CrossRef
  • 6,061 View
  • 110 Download
  • 4 Web of Science
  • 3 Crossref