Biliary tract intraductal papillary mucinous neoplasm: Report of 19 cases

Figure 1 Imaging presentation of biliary tract intraductal papillary mucinous neoplasm. A: Magnetic resonance cholangiography shows dilation of proximal biliary tract and a filling defect in the extrahepatic biliary tract (arrow); B: Magnetic resonance imaging shows an intraluminal polypoid lesion originating from the extrahepatic biliary tract (arrow).

Figure 2 Gross appearance of resected specimen. Biliary tract intraductal papillary mucinous neoplasm appeared as a nodular lesion on the distal common bile duct with massive mucin deposition throughout.

Figure 3 Histopathology of biliary tract intraductal papillary mucinous neoplasm. Hematoxylin and eosin staining of A: Common bile duct biliary tract intraductal papillary mucinous neoplasm, composed of papillary proliferation of atypical biliary epithelial cells (magnification × 40); and B: High-grade cytologic atypia and mucin in the numerous goblet cells (magnification × 100).

Figure 4 Kaplan-Meier survival curve. Survival curves for patients with benign (n = 9) and malignant (n = 10) biliary tract intraductal papillary mucinous neoplasms.