Endoscopic submucosal dissection as alternative to surgery for complicated gastric heterotopic pancreas

Figure 4 Representative histologic images of gastric heterotopic pancreas. A: Patient 1: Pancreatic tissue is in proper muscle with involvement of resection margin (arrow) (hematoxylin-eosin; original magnification, × 40); B: Patient 3: There is focal nest of cells and bluish material with fibrosis and severe cautery artifact (× 100); C: Patient 4: Submucosal fibrosis with foreign body reaction and dystrophic calcification (arrow) was noted (× 40); D: Patient 5: Pancreatic tissue is in submucosa overlying gastric mucosa (× 40).