Case Report
Copyright ©The Author(s) 2021.
World J Gastroenterol. Jul 28, 2021; 27(28): 4738-4745
Published online Jul 28, 2021. doi: 10.3748/wjg.v27.i28.4738
Figure 2
Figure 2 Histological findings of biopsy specimens from duodenal lesion. A: Adenocarcinoma cells proliferate in the proper mucosal and submucosal layer with ulcer formation (HE staining, × 200); B: Adenocarcinoma cells show strong HER2 membranous expression (× 200); C and D: Adenocarcinoma cells proliferate in the submucosal layer with strong HER2 protein expression (× 54).