Evidence map›Paper›PMID 32418026›Full record

ArticleNeuroradiology2020

Clivus length distinguishes between asymptomatic healthy controls and symptomatic adult women with Chiari malformation type I.

Blaise Simplice Talla Nwotchouang, Maggie S Eppelheimer, Alaaddin Ibrahimy, James R Houston, Dipankar Biswas, Richard Labuda, Jayapalli Rajiv Bapuraj, Philip A Allen, David Frim, Francis Loth

Abstract read
In one paragraph

Article in Neuroradiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.9field-weighted citation impact, top 9% 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

19 citing papers in PubMed, 23 citations in OpenAlex.

  1. Clinical and MRI morphometric characterization of symptomatic cerebellar tonsillar ectopia.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
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  4. MRI-morphometric characterization of Chiari malformation types 0 and 1 with syringomyelia: implications for diagnosis and pathogenesis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
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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 at 5 institutions in 1 country.

Blaise Simplice Talla NwotchouangConquer Chiari Research Center, Department of Biomedical Engineering, The University of Akron, Akron, OH, USA. bn23@zips.uakron.edu.ORCID https://orcid.org/0000-0002-2479-0903
Maggie S EppelheimerConquer Chiari Research Center, Department of Biomedical Engineering, The University of Akron, Akron, OH, USA.
Alaaddin IbrahimyConquer Chiari Research Center, Department of Mechanical Engineering, The University of Akron, Akron, OH, USA.
James R HoustonDepartment of Psychology, Middle Tennessee State University, Murfreesboro, TN, USA.
Dipankar BiswasFluids and structure (FaST) Laboratory, Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, USA.
Richard LabudaConquer Chiari, Wexford, PA, USA.
Jayapalli Rajiv BapurajDepartment of Radiology, University of Michigan Health System, Ann Arbor, MI, USA.
Philip A AllenConquer Chiari Research Center, Department of Psychology, The University of Akron, Akron, OH, USA.
David FrimDepartment of Neurosurgery, University of Chicago, Chicago, IL, USA.
Francis LothConquer Chiari Research Center, Department of Biomedical Engineering, The University of Akron, Akron, OH, USA.
University of Akron · USMichigan Medicine · USMiddle Tennessee State University · USUniversity of Central Florida · USUniversity of Chicago · US

Funding

Novel MR Image Processing as an Objective Diagnostic Test for Chiari MalformationR15NS109957 · NINDS · UNIVERSITY OF AKRON · PI ALLEN, PHILIP A. · 2019 to 2019
$469k
NINDS NIH HHS R15 NS109957
6 · The paper itself

Abstract

purposeWhile the presence of cerebellar tonsillar descent in radiological images has been used as evidence of Chiari malformation type I (CMI), tonsillar ectopia alone is insufficient to identify individuals with symptomatic CMI. This study sought to identify differences in brain morphology between symptomatic CMI and healthy controls in adult females.

methodsTwo hundred and ten adult females with symptomatic CMI and 90 age- and body mass index-matched asymptomatic female controls were compared using seven brain morphometric measures visible on magnetic resonance images. The CMI and control groups were divided into four subgroups based on the tonsillar position (TP) relative to the foramen magnum: group 1 was made up of healthy controls with normal TP (TP < 0 mm); group 2 was comprised of control individuals with low-lying TP (1-5 mm); group 3 was comprised of symptomatic CMI patients with low-lying TP (1-5 mm); group 4 contained symptomatic CMI patients with severe tonsillar descent (6-13 mm).

resultsAll morphometrics for symptomatic CMI with severe tonsillar descent were significantly different than those for both control groups. The CMI group with low-lying TP was significantly different for four measures when compared to controls with normal TP. However, only clivus length was statistically different between the CMI and healthy control groups with low-lying TP.

conclusionThis study demonstrates that clivus length distinguishes adult female healthy individuals with low-lying tonsils from those with symptomatic CMI. Further investigation is required to understand the importance of a shorter clivus length on CMI symptomatology and pathophysiology.

Indexed as

Arnold-Chiari MalformationAdultCase-Control StudiesCranial Fossa, PosteriorFemaleHumansMagnetic Resonance ImagingCerebellar tonsilsChiari malformation type IClivus lengthMagnetic resonance imagingMorphometrics

Identifiers

PMID32418026
PMCPMC12564561
OpenAlexW3025308081

What OpenQuestion holds

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Read underepoch 390

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.