Evidence map›Paper›PMID 41632284›Full record

ArticleSkeletal radiology2026

Prevalence and imaging characteristics of the transverse trochlear ridge on elbow MRI and radiographs in youths.

Steffi Häberlin, Julius Peter Sigl, Sebastian Leschka, Stefan Markart, Stephan Waelti, Nicole Graf, Tim Fischer, Tobias Dietrich

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Article in Skeletal radiology, 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

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Steffi HäberlinRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland. hsteffi@bluewin.ch.
Julius Peter SiglRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.
Sebastian LeschkaRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.
Stefan MarkartRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.
Stephan WaeltiRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.
Nicole GrafClinical Trials Unit, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.
Tim FischerRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.
Tobias DietrichRadiology and Nuclear Medicine, HOCH, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, St. Gallen, 9007, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe transverse trochlear ridge (TTR) is an anatomic variant of the ulnar trochlear groove. This study evaluated the prevalence and imaging characteristics of the TTR on MRI and radiographs in children, adolescents, and young adults. MATERIALS AND

methodsThis retrospective analysis included 178 MRI examinations and 95 corresponding radiographs of patients aged 4-25 years. The presence or absence of the TTR was evaluated. The width, height, and depth of the TTR were measured. The sensitivity and specificity of radiography to detect TTRs were evaluated compared with MRI as the reference standard. Binomial logistic regression analysis was used to compare the effects of age and gender on the prevalence of TTR.

resultsTTR was observed on 149 of 178 (83.7%) elbow MRIs. Mean width, height, and depth were 20.6 ± 3.0 mm, 4.2 ± 1.2 mm, and 2.0 ± 0.7 mm, respectively. Comparing increasing age in years with the prevalence of the TTR revealed a statistically significant odds ratio of 1.119 (95% CI; p = 0.012). The maximum predicted probability was a prevalence of 96% for TTR at the age of 25. Sensitivity and specificity values of the TTR on radiographs were 29.6% and 92.9%. Cohen's kappa for the inter-rater agreement for the prevalence of the TTR on MRI was 0.740.

conclusionsThe predicted prevalence of TTR demonstrated an age-dependent increase in the prevalence up to 17 years of age. The size of the TTR also demonstrated an age‑dependent increase during adolescence. The high frequency of TTR on MRI indicates that TTR represents a common variant.

Indexed as

Elbow JointMagnetic Resonance ImagingRadiographyUlnaAdolescentAdultAnatomic VariationChildChild, PreschoolFemaleHumansMalePrevalenceRetrospective StudiesSensitivity and SpecificityYoung AdultAnatomic variantElbow jointMagnetic resonance imagingRadiographsTransverse trochlear ridge

Identifiers

PMID41632284

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