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(A) Foveal epithelial hyperplasia of gastric mucosa, the helicobacter pylori (H. pylori) showed brown expression, by En Vision method, Hp ×400. (B) Dysfunction of stem cells in the proliferative zone, reduced MUC5AC positive cells, by En Vision method, ×200. (C) Proliferation and transformation of surface epithelial cells, CEA showed positive expression, by En Vision method, ×200. (D) Signet-ring-like heterocysts, CK7 showed positive expression, by En Vision method, ×200.
