# Osteochondral Fracture of the Posterior Aspect of Lateral Femoral Condyle Presumably Caused by Tibia Pushing Up Against the Femur—A Case Report

## TL;DR

A 16-year-old girl suffered a rare knee injury where her femur was damaged by the tibia pushing up against it, following a patellar dislocation.

## Contribution

This case report presents a novel injury mechanism for posterior lateral femoral condyle osteochondral fractures.

## Key findings

- The injury occurred due to tibial upward force against the femur following patellar dislocation.
- Successful treatment involved fixing the osteochondral fragment and reconstructing the medial patellofemoral ligament.
- This is only the third reported case of such an injury with a distinct mechanism from previous cases.

## Abstract

A healthy 16-year-old girl presented with an osteochondral fracture of the posterior aspect of the lateral femoral condyle (LFC) following patellar dislocation. Satisfactory results were obtained with osteochondral fragment fixation and medial patellofemoral ligament (MPFL) reconstruction. To the best of our knowledge, this is only the third reported case of an osteochondral fracture of the posterior LFC. However, we believe that the mechanism of injury differed from that in the two previous cases.