Osteoehondritis dissecans (OCD) of the lateral femoral condyle.AP radiograph of the knee showing a typical osteochondral lesion with a defect containing a fragment, located centrally in the femoral condyle.
Aetiology of OCD: Unknown; most commonly accepted thories are trauma, abnormal ossification within the epiphysis, ischaemia, or some combination of these.
The medial condyle is involved 85% of the time vs. 15% of the lateral condyle.
50% of loose bodies in the knee are associated with OCD.
