Fig. 4

Immunohistochemistry. a CDX2 (×100). The mucosal epithelium of the small intestine was positive and the gastric crypt-like epithelium was negative. b MUC2 (×100). The goblet epithelium of the mucosa of the small intestine was positive and the gastric crypt-like epithelium was negative. c MUC5AC (×100). The mucosal epithelium of the small intestine was negative and the superficial gastric crypt-like epithelium was positive. d MUC6 (×100). The mucosal epithelium of the small intestine was negative and the gastric crypt-like epithelium was positive