Case of a tumor comprising gastric cancer and duodenal neuroendocrine tumor

Figure 3 Histopathological results of the resected specimen. A: Low power view of a histological section demonstrates that the neuroendocrine tumor (NET) in the submucosa was covered with adenocarcinoma (HE stain × 40); B: Both component cells had mixed in some parts and formed a tumor alveolar (H&E stain × 400); C: High power view of NET in submucosa (HE stain × 400); D: CD56; E: syNaptophisin; F: Chromogranin A staining were positive in the NET cells; G: Lymphatic invasion of the NET component seen with D2-40 staining (× 400).