Figure 4

Characteristics of pancreatobiliary-type tumors. (a) Endoscopic image. (b) Hematoxylin–eosin staining of the tumor (× 40). (c) MUC1 expression in the tumor (× 40). (d) MUC2 expression in the tumor (× 40). MUC1, pancreatic-type mucin; MUC2, intestinal-type mucin.