Figure 1 MMP-2 expression in different histological types of pancreatic carcinoma (avidin-biotin). Cytoplasmic expression of MMP-2 in PDAC: (a) well differentiated, (b) moderately differentiated, (c) poorly differentiated, and (d) acinar cell carcinoma of pancreas. Immunostained section, magnification: ×400 for all. MMP-2, matrix metalloproteinase-2; PDAC, pancreatic ductal adenocarcinoma.