Case Report
Copyright ©The Author(s) 2021.
World J Clin Cases. Jan 6, 2021; 9(1): 267-273
Published online Jan 6, 2021. doi: 10.12998/wjcc.v9.i1.267
Figure 2
Figure 2 Histological assessment of biopsy specimen. A: Biopsy of the ampulla of Vater showed inflammatory cell infiltration and granulation tissue [hematoxylin and eosin (H&E) stain, × 100 magnification]; B: Many plasma cells were observed in the subepithelial stroma (H&E stain, × 400 magnification); C: Immunohistochemical staining showed a large number of IgG4 positive cells (brown, × 400 magnification).