2025 ISAKOS Biennial Congress ePoster
Association Between Medial Collateral Ligament Injury, Posterior Medial Meniscal Root Injury, And Medial Meniscal Extrusion
Paulo Vitor Carrijo , MD, São Paulo, São Paulo BRAZIL
Alexandre Zobiole, MD, São Paulo, SP BRAZIL
Davi Casadio, MD, São Paulo, São Paulo BRAZIL
Renan M. Chaim, São Paulo, SP BRAZIL
Moises Cohen, MD, PhD, Prof., São Paulo, SP BRAZIL
Diego Costa Astur, MD, PhD, São Paulo, SP BRAZIL
Universidade Federal de São Paulo, São Paulo, SP, BRAZIL
FDA Status Not Applicable
Summary
Complete medial meniscus root tear (MMRT) is associated with greater meniscal extrusion, particularly in patients with concurrent medial collateral ligament (MCL) injury, compared to partial MMRT.
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Abstract
Purpose
To evaluate the association between posterior medial meniscus root tear (MMRT) with the meniscal extrusion and medial collateral ligament (MCL) injury after a traumatic valgus force in the knee.
Methods
55 patients with an acute traumatic valgus force in the knee and diagnosed with a posterior MMRT injury (either partial or complete) on MRI and confirmed arthroscopically were evaluated and compared according to specific associated injuries; meniscal extrusion, associated MCL injury, and presence of associated bone edema.
Results
A more significant meniscal extrusion was observed in patients with complete medial meniscus root tear (C-MMRT) (p = 0.008). Patients with MCL injury presented with significantly greater meniscal extrusion when compared to individuals without MCL injury (p = 0.042). Similarly, the incidence of bone bruising was higher in patients with an MMRT and associated MCL injury than in patients without concomitant MCL injury (p = 0.012).
Conclusions
Patients with a complete medial meniscus root tear (C-MMRT) showed more significant meniscal extrusion than patients with a partial medial meniscus root tear (P-MMRT). A concurrent MCL injury was significantly linked to meniscal extrusion in concomitant meniscal root injury patients. There was no notable difference in meniscal extrusion between patients with and without subchondral edema. However, it was significantly more common in patients with P-MMRT and MCL than in those without MCL.