Simultaneous liver mucinous cystic and intraductal papillary mucinous neoplasms of the bile duct: A case report

Figure 1 Computed tomography scan and T1-weighted magnetic resonance imaging. A: Computed tomography scan (portal phase) shows a hepatic cystic tumor with thin contrast-enhanced septum and dilated intrahepatic bile ducts; B: T1-weighted magnetic resonance imaging of the tumor presents a hyperintense, multiseptal cystic lesion that does not communicate with the bile ducts.

Figure 2 Magnetic resonance and preoperative endoscopic retrograde cholangiopancreatography. A: Magnetic resonance cholangiopancreatography shows dilated main hepatic and common bile duct with a sharp change in diameter from 25 to 5 mm; B: Preoperative endoscopic retrograde cholangiopancreatography shows marked dilation of the extrahepatic biliary ducts with a contrast-filling defect caused by an oval intraductal tumor.

Figure 3 Histology of the intrahepatic tumor. A: The cyst is covered with a single layer of cuboidal epithelial cells showing low grade dysplasia (hematoxylin-eosin stain, × 100 magnification); B: The tumor produces mucin; C: Ovarian-like stroma staining positively for estrogen receptor.

Figure 4 Histology of the intraductal papillary mucinous neoplasm of the bile duct showing papillary proliferation.