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Pathological results of synovitis. The surface of bone and joint is smooth without synovium hyperplasia (TP-SLN and BS group, (A)). Mild synovial hyperplasia, a small number of inflammatory cells and synovial cells increased (TP group, (B)). Severe synovial hyperplasia with a large number of inflammatory cell infiltration and ulceration of lining layer (DMSO and control group, (C) and (D)) (red arrow, HE, 40×).
