Fig. 3

Representative images of gastroscopy, colonoscopy and video capsule endoscopy. Before effective treatment, gastric antrum mucosa was swollen with scattered punctate pigmentation, dense granular and nodular uplift (A), a laterally developing tumor-like protrusion in the cecum, multiple polyps along the colon (C), and edema and atrophied of mucosa and villi of small intestine with mosaic and sawtooth signs and diffuse polypoid lesions (E). After methylprednisolone-based comprehensive therapy, both gastric and colonic mucosa became smooth and all polyps subsided (B, D), edema and atrophied mucosa and villi were reduced, and small intestine polypoid lesions disappeared (F)