Variability of unilateral epiphyseal dysplasia (dysplasia epiphysealis hemimelica).

Nine cases of dysplasia epiphysealis hemimelica (Trevor disease) are reviewed. This osteocartilaginous process arises from the epiphysis and most commonly involves the ankle and knee. While usually mild, 3 cases of greater severity were found with associated arrest of the growth plate. One mild and 2 severe cases are presented in greater detail. The term unilateral epiphyseal dysplasia is proposed as the condition may involve the upper extremity and often involves more than half the epiphysis.