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Figure 2: (a) Thickened pylorus; (b) Expansion of submucosa and muscularis by smooth muscle cells (black arrow) in a collagenous stroma (white arrow) (H and E, ×40); (c) Dilated ductal structures and Brunner type glands are seen surrounded by the smooth muscle cells (arrow) (H and E, ×10); (d) periodic acid–Schiff stain (×100) highlights the mucus within the glands (arrow); (e) CK7 immunohistochemistry (×200) highlights the dilated ductal structures lined by intestinal epithelium; (f) synaptophysin staining (×200) does not demonstrate pancreatic tissue

Figure 2: (a) Thickened pylorus; (b) Expansion of submucosa and muscularis by smooth muscle cells (black arrow) in a collagenous stroma (white arrow) (H and E, ×40); (c) Dilated ductal structures and Brunner type glands are seen surrounded by the smooth muscle cells (arrow) (H and E, ×10); (d) periodic acid–Schiff stain (×100) highlights the mucus within the glands (arrow); (e) CK7 immunohistochemistry (×200) highlights the dilated ductal structures lined by intestinal epithelium; (f) synaptophysin staining (×200) does not demonstrate pancreatic tissue