Fig. 1From: 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-up a, b Simple radiographic images of a 31-year-old female showed a large osteochondral defect on the lateral femoral condyle of right kneeBack to article page