Fig. 5

A desmin staining outlined muscularis mucosae. B higher-power magnification of the yellow box in A (IHC, ×40). C CD20 staining labeled lymphoid follicles (lower power in left panel, higher-power in the right panel, ×200). D CD3 staining labeled T-lymphocyte in the tumor-infiltrating lymphoid tissue (lower power in left panel, higher-power in the right panel, ×200)