Congenital Short Femur – Lengthening Over a Rush Pin with Knee Ligament Reconstruction

Congenital shortening of the femur is a spectrum of deformity ranging from proximal focal femoral deficiency to a normal or almost normal femur which is a little short. There are a number of classifications mainly based on radiological appearance, but more recently classifications have been devised of more relevance to reconstruction surgery as they take into account some of the other features of this condition such as joint stability. These other features, together with the abnormal bone, have rightly given reconstruction and lengthening of congenital short femur a reputation for difficulty and complications. This case illustrates some of these difficulties and how they may be overcome.