Evidence map›Paper›PMID 42234397›Full record

ArticleSpine deformity2026

Changes in retroperitoneal anatomy of the lumbar spine in supine, prone, and lateral lumbar spine MRIs.

Briana M Pompa-Hogan, Gabriel B Mason, Miles W A Fisher, Daniel D Homeier, Gavin L Mills, Nadiya V Yerich, James K Aden, Richard K Hurley

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Article in Spine deformity, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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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

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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

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Briana M Pompa-HoganDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA. pompahogan@gmail.com.ORCID http://orcid.org/0009-0005-3923-4642
Gabriel B MasonDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA.
Miles W A FisherDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA.
Daniel D HomeierDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA.
Gavin L MillsDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA.
Nadiya V YerichDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA.
James K AdenGraduate Medical Education, Brooke Army Medical Center, San Antonio, TX, 78234, USA.
Richard K HurleyDepartment of Orthopaedic Surgery, Brooke Army Medical Center, San Antonio, TX, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo investigate the changes in anatomy of the retroperitoneal (RP) space and lumbar lordosis based on magnetic resonance imaging (MRI) acquired in different positions.

methodsTwelve adults underwent MRI in the right-lateral decubitus, prone, and supine positions. At each lumbar disc space, the cross-sectional area (CSA) of the psoas, RP space CSA, distance to the great vessels, and lumbar lordosis were measured.

resultsAt L2-3, the CSA of the RP space was increased in the lateral position compared to the prone position (11.4cm

conclusionThis study found that the size of the RP space varies depending on patient positioning and sex, while also demonstrating a flattening effect as RP CSA decreased at L3/4 in the lateral position. A nuanced understanding of the RP anatomy may influence a surgeon's decision-making regarding intraoperative patient positioning to exploit safe operative corridors.

Indexed as

Lumbar VertebraeMagnetic Resonance ImagingPatient PositioningAdultFemaleHumansLordosisMaleMiddle AgedProne PositionRetroperitoneal SpaceSupine PositionLateral positionLumbar lordosisProne positionRetroperitoneal AnatomySupine positionTranspsoas approach

Identifiers

PMID42234397

What Socratic 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 Socratic graph.