Fig. 4From: Restoration of a large osteochondral defect of the knee using a composite of umbilical cord blood-derived mesenchymal stem cells and hyaluronic acid hydrogel: a case report with a 5-year follow-upGross photos shows a initial osteochondral defect site, b defect site just after implantation of umbilical cord blood derived mesenchymal stem cells, and c removed loose bodiesBack to article page