FIGURE 2
Examples of Cdx2 immunohistochemistry in non-neoplastic tissue. A, gastric antrum sample in tissue microarray showing no nuclear staining (original magnification, 100×). B, duodenum sample in tissue microarray showing staining exclusively in enterocytes. Note that Brunner gland epithelium exhibits no staining (original magnification, 100×). C, colon sample in tissue microarray showing staining exclusively in colonocytes (original magnification, 100×). D, anus sample in tissue microarray showing no nuclear staining (original magnification, 200×). E, standard section of pancreas showing staining of centroacinar cells and small ducts (original magnification, 200×). The inset shows a higher power of an acinus (original magnification, 1000×). F, large pancreatic duct showing spotty epithelial staining (original magnification, 400×).
