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Synovial hyperplasia of rats following H&E staining. In the control group (C), the structure of the synovial membrane was clear and smooth, without hyperplasia. In the model group (M), the structure of the synovial tissue demonstrated disorder and the layers of synovial cells were more randomly arranged. In the intervention group (I), synovial hyperplasia was reduced compared with that in the model group. H&E, hematoxylin and eosin.
