Dynamic Valgus Instability of the Knee due to Chronic Medical Collateral Ligament Laxity as a Cause of Recurrent Patella Dislocation

Gohil S Martineau P

doi:10.4172/2161-0673.1000168

Abstract

Recurrent patella dislocation can be caused by bony abnormalities, such as patella alta, increased tibial tubercle lateralization, trochlea dysplasia, excessive femoral neck anteversion and external tibial torsion. It can also be caused by soft tissue abnormalities such as a ruptured medial patellofemoral ligament (MPFL) or a weak vastus medialis obliquus. It has been reported in the literature that acute lateral dislocation of the patella can be associated with proximal injury to the medial collateral ligament (MCL). This article reports the case of a 26-year-old male pro footballer who had recurrent patella dislocation related to previous injury to his MPFL and worsened by dynamic valgus knee instability due to chronic MCL insufficiency.

Highlights

Numerous anatomical factors have been identified that predispose to patella dislocation
We present a case of dynamic valgus instability of the knee in a pro footballer secondary to a chronic medial collateral ligament (MCL) strain leading to recurrent patella dislocation
Recurrent patellar dislocation can be caused by both bony and soft tissue abnormalities as highlighted in the abstract [1,2]

Summary

Introduction

Numerous anatomical factors have been identified that predispose to patella dislocation. We present a case of dynamic valgus instability of the knee in a pro footballer secondary to a chronic MCL strain leading to recurrent patella dislocation. A 26-year-old male pro footballer presented to our institution with a history of recurrent patella dislocation. His last dislocation was a month prior and occurred as a valgus force was applied to his knee when a player landed on him as he was tackled.

Results

Conclusion