Evidence map›Paper›PMID 38847817›Full record

SynthesisEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025

Open posterior approach versus endoscopic approach for thoracic ligamentum flavum ossification: a systematic review and meta-analysis.

Chun-Ru Lin, Sung Huang Laurent Tsai, Ta-Wei Yu, Po-Cheng Lin, Zheng-Da Tsai, Kuo-Hao Lee, Tsai-Sheng Fu, Po-Liang Lai, Tsung-Ting Tsai, Yung-Hsueh Hu

Abstract readSystematic ReviewMeta-AnalysisComparative Study
PubMed Publisher
In one paragraph

Synthesis in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Midline delta double-door decompression (MDDD), a novel strategy for thoracic ossification of the ligamentum flavum via uni-portal noncoaxial spinal endoscopic surgery (UNSES): a case series.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
    Article
  3. Thoracic ossification of the ligamentum flavum in elite athletes: a case series with surgical outcomes and return-to-play profiles.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
    Article
  4. Article
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  6. Article
  7. [Short-term effectiveness of floating island laminectomy surgery for thoracic spinal stenosis and myelopathy caused by ossification of ligamentum flavum].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2025
    Article
  8. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Chun-Ru Lin *Department of Medical Education, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fuxing Street, Guishan District, Taoyuan City, 333, Taiwan.
Sung Huang Laurent Tsai *Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Keelung Branch, and Chang Gung University, F7, No 222 Mai-King Road, Keelung, Taiwan.
Ta-Wei YuDepartment of Medical Education, Kaohsiung Veterans General Hospital, No.386, Dazhong 1 Rd., Zuoying District, Kaohsiung City, 813414, Taiwan.
Po-Cheng LinSchool of Medicine, College of Medicine, Fu Jen Catholic University, 510, Zhongzheng Rd., Xinzhuang District, New Taipei City, 24205, Taiwan.
Zheng-Da TsaiSchool of Medicine, College of Medicine, Fu Jen Catholic University, 510, Zhongzheng Rd., Xinzhuang District, New Taipei City, 24205, Taiwan.
Kuo-Hao LeeSchool of Traditional Chinese Medicine, Chang Gung University, 259 Wen-Hwa 1 Road, Kwei-Shan Tao-Yuan, Taiwan.
Tsai-Sheng FuDepartment of Orthopaedic Surgery, Guishan District, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fuxing Street, Taoyuan City, 333, Taiwan.
Po-Liang LaiDepartment of Orthopaedic Surgery, Guishan District, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fuxing Street, Taoyuan City, 333, Taiwan.
Tsung-Ting TsaiDepartment of Orthopaedic Surgery, Guishan District, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fuxing Street, Taoyuan City, 333, Taiwan.
Yung-Hsueh HuDepartment of Orthopaedic Surgery, Guishan District, Chang Gung Memorial Hospital, Linkou Branch, No. 5, Fuxing Street, Taoyuan City, 333, Taiwan. erichu10965@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThoracic ossification of the ligamentum flavum (TOLF), a rare condition more prevalent in East Asia, is managed through open and endoscopic surgical approaches. Determining the superior surgical option remains unclear. This study assesses the safety and clinical outcomes associated with these approaches in TOLF patients.

methodsFollowing Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, we conducted a systematic literature search up to August 5, 2023, across PubMed, Scopus, EMBASE, Web of Science, Cochrane, and ClinicalTrials.gov. We included randomized controlled trials and cohort studies reporting complication rates, mJOA (modified Japanese Orthopedic Association) scores, JOA scores, VAS (Visual Analog Scale) scores, or hospitalization duration for both open and endoscopic surgeries in TOLF patients.

resultsWe analyzed 37 studies encompassing 1,646 TOLF patients using a random-effects model. Our findings revealed a significant difference in complication rates (overall complication rates: 0.12; 95% CI: 0.07, 0.19; p < 0.01; I2: 69%; quality of evidence: moderate), with lower complication rates in the endoscopy group. However, no significant differences were observed in JOA scores (overall JOA: 8.35; 95% CI: 7.16, 9.54; p = 0.12; I2: 99%; quality of evidence: very low), VAS scores (overall VAS: 1.31; 95% CI: 1.03, 1.59; p = 0.35; I2: 91%; quality of evidence: very low), or hospitalization duration (hospital stay: 10.83 days; 95% CI: 6.86, 14.80; p = 0.35; I2: 91%; quality of evidence: very low) between the open and endoscopic groups.

conclusionsThis meta-analysis reports lower complication rates and improved postoperative mJOA scores for endoscopic surgery in TOLF patients compared to open surgery. It represents the first comprehensive evaluation of clinical outcomes and safety of different surgical approaches for TOLF patients. Further randomized controlled trials are essential to validate these findings.

Indexed as

EndoscopyLigamentum FlavumOssification, HeterotopicThoracic VertebraeHumansPostoperative ComplicationsDecompressionEndoscopic spine surgeryOssification of ligamentum flavumSpinal endoscopyThoracic myelopathyThoracic spine

Identifiers

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.