Figure 2: Examination of chondrogenesis in pellet cell cultures in Group A (in which the synovium was harvested from the transitional zone between the articular cartilage and the synovial membrane at the femoral condyle) and Group B (in which the synovium was harvested from an area 5 mm medial to the transitional zone of the femoral condyle). Cartilage-like tissue (stained with Toluidine blue) was found in both groups. Synovial cells derived from Group A showed greater chondrogenic differentiation potential than those in B with respect to pellet size and the intensity of staining with Toluidine blue.