Figure 3
Expression of CD20 in pancreatic ductal adenocarcinoma. Representative photomicrographs of CD20 expression. a: moderate number of B lymphocytes in the stroma (red arrow head) in pancreatic carcinoma. b: Lymphoid follicle (red arrow head) rich in CD20 lymphocytes from patient with pancreatic carcinoma. c: absence of CD20 in both epithelial component (red arrow head) and stroma (green arrow head) in poorly differentiated pancreatic adenocarcinoma (G3). Photomicrographs are at 5× magnification.