[Dysplasia epiphysealis hemimelica: an unusual case].

The authors have observed an eleven-year-old boy with an unusual example of dysplasia epiphysealis hemimelica. Initially there was an intra-articular cartilaginous loose body in the knee. A discrepancy in limb length was noted, which corrected spontaneously. After an eight year follow-up, knee destruction was severe despite surgical treatment on three occasions. A tibio-tarsal arthrodesis was also performed.