Heterotopic pancreas in the gastrointestinal tract

Figure 1 Endoscopy showing a solid tumor mass under the mucosal membrane in the gastric antrum.

Figure 2 CT reconstruction showing a mass with a diameter of 2 cm in the gastric antrum.

Figure 3 Echogatstroscope revealing low-echogenicity mass under the gastric wall submucosal muscularis propria, with a clear boundary and uneven internal echogenicity.

Figure 4 Lobules of pancreatic tissue with ducts located within the smooth muscle of the pylorus (HE, × 100).