Evidence map›Paper›PMID 29999448›Full record

ReviewJournal of neurosurgery2019

Rates and predictors of seizure outcome after corpus callosotomy for drug-resistant epilepsy: a meta-analysis.

Alvin Y Chan, John D Rolston, Brian Lee, Sumeet Vadera, Dario J Englot

Open access · bronzeAbstract readReview
In one paragraph

Review in Journal of neurosurgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 2 pooled it
4.4field-weighted citation impact, top 5% of its field
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

27 citing papers in PubMed, 2 syntheses or guidelines pooled it, 98 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Beyond seizures: understanding adaptive functioning in drug-resistant epilepsy in patients undergoing palliative surgery.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2026
    Observational
  7. Review
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Corpus callosotomy for intractable epilepsy in the pediatric population: value of intraoperative neurophysiological monitoring.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2025
    Review
  15. Review
  16. Changes in interhemispheric coherence after total corpus callosotomy: a scalp EEG study in children with non-lesional generalized epilepsy.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2024
    Article
  17. Review
  18. Article
  19. Article
  20. 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

5 authors at 3 institutions in 1 country.

Alvin Y Chan1Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin.
John D Rolston2Department of Neurosurgery, University of Utah, Salt Lake City, Utah.
Brian Lee3Department of Neurological Surgery, University of Southern California, Los Angeles.
Sumeet Vadera4Department of Neurological Surgery, University of California, Irvine, California; and.
Dario J Englot5Department of Neurological Surgery, Vanderbilt University, Nashville, Tennessee.
Neurological Surgery · USMedical College of Wisconsin · USUniversity of Utah · US

Funding

MULTIMODAL MAPPING OF SUBCORTICAL AND CORTICAL FUNCTIONAL NETWORK DISTURBANCES IN FOCAL EPILEPSYR00NS097618 · NINDS · VANDERBILT UNIVERSITY MEDICAL CENTER · PI ENGLOT, DARIO J · 2017 to 2019
$743k
NINDS NIH HHS R00 NS097618
6 · The paper itself

Abstract

objectiveCorpus callosotomy is a palliative surgery for drug-resistant epilepsy that reduces the severity and frequency of generalized seizures by disconnecting the two cerebral hemispheres. Unlike with resection, seizure outcomes remain poorly understood. The authors systematically reviewed the literature and performed a meta-analysis to investigate rates and predictors of complete seizure freedom and freedom from drop attacks after corpus callosotomy.

methodsPubMed, Web of Science, and Scopus were queried for primary studies examining seizure outcomes after corpus callosotomy published over 30 years. Rates of complete seizure freedom or drop attack freedom were recorded. Variables showing a potential relationship to seizure outcome on preliminary analysis were subjected to formal meta-analysis.

resultsThe authors identified 1742 eligible patients from 58 included studies. Overall, the rates of complete seizure freedom and drop attack freedom after corpus callosotomy were 18.8% and 55.3%, respectively. Complete seizure freedom was significantly predicted by the presence of infantile spasms (OR 3.86, 95% CI 1.13-13.23), normal MRI findings (OR 4.63, 95% CI 1.75-12.25), and shorter epilepsy duration (OR 2.57, 95% CI 1.23-5.38). Freedom from drop attacks was predicted by complete over partial callosotomy (OR 2.90, 95% CI 1.07-7.83) and idiopathic over known epilepsy etiology (OR 2.84, 95% CI 1.35-5.99).

conclusionsThe authors report the first systematic review and meta-analysis of seizure outcomes in both adults and children after corpus callosotomy for epilepsy. Approximately one-half of patients become free from drop attacks, and one-fifth achieve complete seizure freedom after surgery. Some predictors of favorable outcome differ from those in resective epilepsy surgery.

Indexed as

anterior corpus callosotomycomplete corpus callosotomydisconnection syndromedrop attackepilepsy

Identifiers

PMID29999448
PMCPMC6274594
OpenAlexW2805331050

What OpenQuestion holds

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Registered trials

None linked

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.