Figure 2: Expression of CD109 in Pancreatic Adenocarcinoma. Invasive carcinoma cells were semi-quantitatively analyzed to assign the levels of CD109 protein expression as weak (A;+), moderate (B; 2+) and strong (C; 3+). Normal ducts from the same tumor as seen in C were stained negatively (D; -) for the CD109 protein. Perineural invasion by the tumor is seen in B (arrow). Scale bar=5 μm.