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. 2020 Jul 21;18:179. doi: 10.1186/s12957-020-01954-0

Fig. 5.

Fig. 5

Hematoxylin-eosin staining. a The scale bar indicates 500 μm (×40 magnification). b The scale bar indicates 100 μm (×200 magnification). The pathological examination showed an ulcer scar with infiltrating lymphocytes and plasma cells without residual tumors