Evidence map›Paper›PMID 31701278›Full record

SynthesisChild's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery2020

Systematic review and meta-analysis of imaging characteristics in Chiari I malformation: does anything really matter?

Travis J Atchley, Elizabeth N Alford, Brandon G Rocque

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing 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.

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

11 citing papers in PubMed.

  1. Preoperative radiological scoring system in Chiari malformation type 1: a surgical guide.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2026
    Article
  2. Article
  3. Predictors of syrinx presentation and outcomes in pediatric Chiari malformation type I: a single institution experience of 218 consecutive syrinx patients.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2024
    Article
  4. Article
  5. Review
  6. Article
  7. Pediatric Chiari I malformation: novel and traditional measurements associated with syrinx and surgery.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2022
    Article
  8. Article
  9. Article
  10. Review
  11. 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

3 authors.

Travis J AtchleyDepartment of Neurological Surgery, University of Alabama at Birmingham, Birmingham, AL, USA.
Elizabeth N AlfordDepartment of Neurological Surgery, University of Alabama at Birmingham, Birmingham, AL, USA.
Brandon G RocqueDivision of Pediatric Neurosurgery, Children's of Alabama-University of Alabama at Birmingham, Lowder Bldg., Suite 400, 1600 7th Ave. S, Birmingham, AL, 35233, USA. Brandon.rocque@childrensal.org.ORCID 0000-0002-7333-4808

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePrevious studies have attempted to evaluate the utility of preoperative magnetic resonance imaging (MRI) parameters in predicting outcomes in Chiari I malformation. We performed a systematic review and meta-analysis to determine what preoperative imaging features (if any) predict (1) presence of preoperative symptoms or associated findings, (2) need for surgical decompression, or (3) improvement after surgical decompression.

methodsAll publications through June 2018 on PubMed, Embase, and Cochrane Library databases were searched using the keywords "Chiari I malformation" AND "decompression" OR "imaging." One thousand two hundred ten publications were identified, and 20 were included for our systematic review; nine were included in the meta-analysis.

resultsTonsil position, clivus gradient, and scoliotic curve of > 20° were all associated with the presence of preoperative syrinx. Degree of scoliotic curve was associated with length of syrinx. Pre-operative findings of central syrinx morphology, shorter syrinx, and scoliotic curve < 20° were associated with post-operative stability/improvement. Post-operative symptomatic improvement was associated with preoperative pB-C2 line ≥ 3 mm, absence of scoliosis, and presence of syrinx. By meta-analysis, there was no significant difference in post-operative improvement between patients with and without syrinx (OR = 0.89; 95% CI 0.58-1.37). Meta-analysis showed no significant difference in post-operative improvement between patients with and without basilar invagination (OR = 1.31; 95% CI 0.72-2.36).

conclusionsMultiple studies have attempted to identify preoperative imaging parameters to predict post-operative improvement, but no consistently reliable criteria have been defined. This review and meta-analysis highlight the importance of considering each patient's clinical history and physical exam within the context of associated radiographic abnormalities.

Indexed as

Arnold-Chiari MalformationScoliosisSyringomyeliaCranial Fossa, PosteriorDecompression, SurgicalHumansMagnetic Resonance ImagingTreatment OutcomeChiari I malformationMeta-analysisPosterior fossa decompressionSystematic review

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.