Valgus deformity caused by dysplasia epiphysealis hemimelica in the knee

A rare case of dysplasia epiphysealis hemimelica in the left knee which caused valgus deformity and dysfunction of the limb is presented in this article. Subtotal excision of the lesion, distal femoral medial wedge osteotomy, and reconstruction of the medial collateral ligament were performed for treatment. Cannulated screws and plaster casts were used to stabilize the ligament and distal femur. Two years after removal and reconstruction, the knee was symptom free. The left knee laxity was restored and the mechanical axis of the distal femur was realigned.