Fig. 4From: Study on the correlation between the severity of patellofemoral arthritis and the morphology of the distal femura to c represents the course of abnormal changes in the femoral condyle. Line A to line B indicates the change in axial torsion of the femoral condyle. b The blue dashed line indicates the enlargement of the posterior medial condyle of femur and the shortening of the posterior lateral condyle, showing the proportion change of the posterior condyle of both the inner and outer sides of femur. The green dashed line indicates an inward turning projection of the anterolateral condyleBack to article page