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Representative images of patient specimens with a particularly low neutrophil to lymphocyte ratio. The pancreatic ductal adenocarcinoma did not contain any neutrophils: (A) ×100 magnification; (B) ×400 magnification (stain, hematoxylin and eosin). The lymphoid follicles were formed in the stromal tissue adjacent to the tumor: (C) ×100 magnification; (D) ×400 magnification (stain, hematoxylin and eosin).
