Evidence map›Paper›PMID 38768406›Full record

SynthesisNeurology2024

Seizure Outcome After Intraoperative Electrocorticography-Tailored Epilepsy Surgery: A Systematic Review and Meta-Analysis.

Jiaojiao Guo, Ziyi Wang, Maryse A van 't Klooster, Sandra M Van Der Salm, Frans S Leijten, Kees P Braun, Maeike Zijlmans

Registry-linked trialAbstract readSystematic ReviewNetwork Meta-Analysis
In one paragraph

Synthesis in Neurology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07656857 (Precision Resection of the Epileptogenic Zone Using Intraoperative Submillimeter Micro-Electrocorticography), which is not on this map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–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.

NCT07656857 narecruitingnot on this mapstarted 2026, after this paper: background citation

Precision Resection of the Epileptogenic Zone Using Intraoperative Submillimeter Micro-Electrocorticography (Epi-PRECISE): A Single-Arm Trial With an External Historical Control Cohort

TypeinterventionalSponsorBeijing Tiantan HospitalRan2026 to 2028Enrolled85ConditionsFocal Epilepsy, Intraoperative MonitoringArmsUsing High-density Flexible microElectrocorticography for intraoperative monitoring
3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. Article
  2. Article
  3. The usefulness of intraoperative electrocorticography (iECoG) in pediatric temporal lobe epilepsy surgery.Epileptic disorders : international epilepsy journal with videotape · 2026
    Article
  4. Article
  5. Article
  6. Seminars in epileptology: Presurgical epilepsy evaluation.Epileptic disorders : international epilepsy journal with videotape · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Normative atlases of high-frequency oscillation and spike rates under Sevoflurane anesthesia.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2024
    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

7 authors.

Jiaojiao GuoFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.ORCID 0000-0003-3281-1003
Ziyi WangFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.ORCID 0009-0003-2115-0366
Maryse A van 't KloosterFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.ORCID 0000-0002-6594-8965
Sandra M Van Der SalmFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.
Frans S LeijtenFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.ORCID 0000-0003-2603-3364
Kees P BraunFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.ORCID 0000-0003-3631-0003
Maeike ZijlmansFrom the Department of Neurology and Neurosurgery (J.G., Z.W., M.A.K., S.M.V.D.S., F.S.L., K.P.B., M.Z.), University Medical Center Utrecht Brain Center, University Medical Center Utrecht, Part of ERN EpiCARE; and Stichting Epilepsie Instellingen Nederland (SEIN) (M.Z.), the Netherlands.ORCID 0000-0003-1258-5678

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectivesTailoring epilepsy surgery using intraoperative electrocorticography (ioECoG) has been debated, and modest number of epilepsy surgery centers apply this diagnostic method. We assessed the current evidence to use ioECoG-tailored epilepsy surgery for improving postsurgical outcome.

methodsPubMed and Embase were searched for original studies reporting on ≥10 cases who underwent ioECoG-tailored surgery for epilepsy, with a follow-up of at least 6 months. We used a random-effects model to calculate the overall rate of patients achieving favorable seizure outcome (FSO), defined as Engel class I, ILAE class 1, or seizure-free status. Meta-regression was used to investigate potential sources of heterogeneity. We calculated the odds ratio (OR) for estimating variables on FSO:ioECoG vs non-ioECoG-tailored surgery (if included studies contained patients with non-ioECoG-tailored surgery), ioECoG-tailored epilepsy surgery in children vs adults, temporal (TL) vs extratemporal lobe (eTL), MRI-positive vs MRI-negative, and complete vs incomplete resection of tissue that generated interictal epileptiform discharges (IEDs). A Bayesian network meta-analysis was conducted for underlying pathologies. We assessed the evidence certainty using the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE).

resultsEighty-three studies (82 observational studies, 1 trial) comprising 3,631 patients with ioECoG-tailored surgery were included. The overall pooled rate of patients who attained FSO after ioECoG-tailored surgery was 74% (95% CI 71-77) with significant heterogeneity, which was predominantly attributed to pathologies and seizure outcome classifications. Twenty-two studies contained non-ioECoG-tailored surgeries. IoECoG-tailored surgeries reached a higher rate of FSO than non-ioECoG-tailored surgeries (OR 2.10 [95% CI 1.37-3.24]; DISCUSSION: Although limited by low-quality evidence, our meta-analysis shows a relatively good surgical outcome (74% FSO) after epilepsy surgery with ioECoG, especially in tumors, with better outcome for ioECoG-tailored surgeries in studies describing both and better outcome after complete removal of IED areas.

Indexed as

ElectrocorticographyEpilepsyIntraoperative Neurophysiological MonitoringSeizuresHumansNeurosurgical ProceduresTreatment Outcome

Identifiers

PMID38768406
PMCPMC11175635

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Registered trials

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.