Figure 2.

Immunostaining of pancreatic tissue with anti-S100A4 polyclonal antibody. A: Strong labeling of pancreatic adenocarcinoma cells with an absence of labeling of the normal pancreatic cells. B: Pancreatic adenocarcinoma not labeled for S100A4. C: Pancreatic adenocarcinoma with strong labeling of the poorly differentiated area (bottom) whereas the well-differentiated area (top) does not label. D: Reactive ductal change in chronic pancreatitis showing an absence of labeling of duct cells. Original magnifications: ×160 (A, B, D); ×100 (C).