Helicobacter pylori eradication treatment for primary gastric diffuse large B-cell lymphoma: A single-center analysis

Figure 2 Case 2. A: The surface layer of the mucosa on the posterior wall side changed to reddish; B: A subtle ridged change in the mucosa was observed; C: Neoplastic lymphoid cells were densely proliferating in the lamina propria; D: The upper panel shows CD20 immunostaining, and the lower panel shows CD79a immunostaining. Both were clearly positive; E: Atypical lymphoid cells were proliferating in the lamina propria; F: Fourteen months after Helicobacter pylori eradication, a white scar was observed on the posterior wall where diffuse large B-cell lymphoma was present. A, B, and F: Endoscopic findings of the stomach; C-E: Microscopic findings (C and E; hematoxylin hosin staining, scale bar = 100 μm).