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. 2021 Jun 1;16:354. doi: 10.1186/s13018-021-02501-7

Fig. 3.

Fig. 3

 Histological features of the infrapatellar fat pad in the five groups: a Representative photographs showing HE staning of the IFP body, perivascular region, and IFP surface( highlighted by the arrow) regions and Masson staining in the baseline, LIR, MIR, HIR and SED groups. b Semiquantative evaluation of the cell number in the IFP body, perivascular region and surface. c Crown-like structure (highlighted by the arrow) count in the IFP, expressed per 1,000 adipocytes. d Semiquantitative evaluation of IFP vascularization. e Semiguantitative evaluation of IFP fibrosis. Scale bar represents 50 μm. *P < 0.05; **P < 0.01; ***P < 0.001