Fig. 9From: Pure platelet-rich plasma facilitates the repair of damaged cartilage and synovium in a rabbit hemorrhagic arthritis knee modelThe synovium H&E staining of low and high magnifications. The black frame showed the edge of the synovium turning into palisade-like cells in the experiment groups and gathering band-like lymphocytes in severe HA. The red frame shows the inner side of the synovium with synovial stroma increased and lymphocytes infiltratedBack to article page