Association between radial meniscal tears with and without posterior root involvement and subchondral…

Case-controlDiagnostic and interventional imaging· Aug 2026

Association between radial meniscal tears with and without posterior root involvement and subchondral insufficiency fracture of the knee on MRI: The mediating role of meniscal extrusion.

Mohamad Z Alzaher, Wasim Issa, Ambrose J Huang … Mohamed Jarraya

Orthopedic TraumaCase-controlQ1IF 7.5

Radial meniscal root tears are strongly associated with subchondral insufficiency fracture on magnetic resonance imaging.

Association between radial meniscal tears with and without posterior root involvement and subchondral insufficiency fracture of the knee on MRI: The mediating role of meniscal extrusion.

Mohamad Z Alzaher … Mohamed Jarraya

Diagnostic and interventional imaging · Aug 2026 · Q1 in General Medicine

Purpose

The purpose of this study was to evaluate the relationship between subchondral insufficiency fracture (subchondral insufficiency fracture) of the knee and radial meniscal tears on magnetic resonance imaging (magnetic resonance imaging) and to examine within the medial compartment the potential mediating role of meniscal extrusion in this relationship.

Methods

A retrospective matched case-control study of knee magnetic resonance imaging examinations obtained from November 2021 to November 2024 was performed.

n = 343 patients

Results

radial root tears raise the odds of subchondral insufficiency fracture more than sevenfold

OR 7.62 (95% CI 4.40 to 13.21)

CI excludes the null - significant

More results

The cohort included 343 patients with subchondral insufficiency fracture (65.4 ± 10.1 [standard deviation] years; 226 women) and 343 patients without subchondral insufficiency fracture (66.4 ± 10.0 [standard deviation] years; 224 women).

More results

In mediation analysis, medial radial root tears showed an indirect association with medial subchondral insufficiency fracture through medial meniscal extrusion (OR, 1.46; 95% CI: 1.16-1.84), accounting for 16.6% of the total effect.

“

Conclusion · 1 of 2

Radial root and non-root tears are strongly associated with subchondral insufficiency fracture on magnetic resonance imaging, particularly in the medial compartment.

Conclusion · 2 of 2

Meniscal extrusion explained a small proportion of this association, suggesting that additional biomechanical pathways are likely in play.

Association between radial meniscal tears with and without posterior root involvement and subchondral insufficiency fracture of the knee on MRI: The mediating role of meniscal extrusion.

Association between radial meniscal tears with and without posterior root involvement and subchondral insufficiency fracture of the knee on MRI: The mediating role of meniscal extrusion.

Related papers