Tibial hemimelia of a different class

A variant of tibial hemimelia, previously undescribed in the literature and not classifiable by either of the established classification systems, is d escribed. The features of this condition include a short, deformed tibia; p roximal subluxation of the fibula at the knee; a normal knee joint and an a nkle joint that may look abnormal but falls shea of true diastasis of the j oint. Treatment of two cases by differential lengthening of the tibia and f ibula using the Ilizarov device is described. This form of tibial hemimelia should be recognised as a separate variant as preservation of the foot and ankle with expected excellent function should be possible, unlike the more severe forms of this condition.