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Immunohistochemical staining of P16 protein expression. Arrow shows positive cell. A: Normal gastric mucosa SP ×400; B: dysplastic gastric mucosa SP ×400; C: well-differentiated adenocarcinoma SP ×400; D: poorly-differentiated adenocarcinoma SP ×400; E: undifferentiated carcinoma SP ×200; F: undifferentiated carcinoma SP ×400.
