Evidence map›Paper›PMID 33236206›Full record

SynthesisSurgical and radiologic anatomy : SRA2021

Anatomical variations of the pyramidalis muscle: a systematic review and meta-analysis.

Roberto Cirocchi, Isaac Cheruiyot, Brandon Michael Henry, Marco Artico, Sara Gioia, Piergaspare Palumbo, Vincent Kipkorir, Vito D'Andrea, Justus Randolph

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Surgical and radiologic anatomy : SRA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing 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

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

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. 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

9 authors.

Roberto CirocchiDepartment of Surgical Science, University of Perugia, Piazza dell'Universitá, 1, 06123, Perugia, PG, Italy.
Isaac CheruiyotDepartment of Human Anatomy, University of Nairobi, P.O. Box 30197, 00100, Nairobi, Kenya. isaacbmn@outlook.com.ORCID http://orcid.org/0000-0002-1211-8247
Brandon Michael HenryDepartment of Human Anatomy, University of Nairobi, P.O. Box 30197, 00100, Nairobi, Kenya.
Marco ArticoDepartment of Human Anatomy, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185, Rome, RM, Italy.
Sara GioiaDepartment of Surgical Science, University of Perugia, Piazza dell'Universitá, 1, 06123, Perugia, PG, Italy.
Piergaspare PalumboDepartment of General Surgery, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185, Rome, RM, Italy.
Vincent KipkorirDepartment of Human Anatomy, University of Nairobi, P.O. Box 30197, 00100, Nairobi, Kenya.
Vito D'AndreaDepartment of General Surgery, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185, Rome, RM, Italy.
Justus RandolphGeorgia Baptist College of Nursing, Mercer University, 3001 Mercer University Drive, Atlanta, GA, 30341, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo provide a comprehensive evidence-based assessment of the anatomical characteristics of the pyramidalis muscle (PM). MATERIALS AND

methodsA thorough systematic search of the literature through August 31st 2020 was conducted on major electronic databases PubMed, Scopus and Web of Science (WOS) to identify studies eligible for inclusion. Data were extracted and pooled into a meta-analysis using MetaFor package in R and MetaXL. A random-effects model was applied. The primary outcome of interest was the prevalence of PM. The secondary outcomes were the dimensions (length and width) of the PM.

resultsA total of 11 studies (n = 787 patients; 1548 sides) were included in the meta-analysis. The multinomial pooled prevalence estimate (PPE) for a bilateral absence of the PM was 11.3% (95% CI [7.2%, 16.2%], 82.3% (95% CI [76.2%, 87.6%]) for a bilateral presence, and 6.3% (95% CI [3.3%, 10.2%]) for a unilateral presence. Of four studies (n = 37 patients) that reported the side of a unilateral presence, the PPE of a unilateral right-side presence was 42.2% (95% CI [23.0%, 62.3%]) compared to 57.8% for a unilateral left-side presence (95% CI [37.7%, 77.0%]). The mean length of the PM displayed high levels of heterogeneity, ranging from 3.12 to 12.50 cm.

conclusionThe pyramidalis muscle is a rather constant anatomical structure being present in approximately 90% of individuals.

Indexed as

Anatomic VariationAbdominal MusclesHumansAnatomical variationsMorphometryPyramidalis muscle

Identifiers

PMID33236206

What OpenQuestion holds

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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.