Common features between neoplastic and preneoplastic lesions of the biliary tract and the pancreas

Figure 2 Common and distinctive features of pancreatic intraepithelial neoplasias and biliary intraepithelial neoplasms. A: Pancreatic intraepithelial neoplasia, high grade (PanIN-3, 10 ×) sorrounded by infiltrating adenocarcinoma. B: Biliary intraepithelial neoplasia, high grade (BilIN-3, 10 ×) with nearby infiltrating adenocarcinoma Both lesions are microscopic precancerous lesions of pancreas (A) and biliary tree (B), not identifiable by radiological imaging.