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