Primary signet-ring cell carcinoma of the extrahepatic bile duct: A case report

Figure 1 Contrast-enhanced computed tomography and percutaneous transhepatic cholangiopancreatic drainage images. A and B: Contrast-enhanced computed tomography (CECT) of the abdomen shows that the common bile duct wall is thickened and strengthened (arrows) with enlarged lymph nodes (asterisks); C: CECT shows intrahepatic bile duct dilation (arrows) and multiple liver metastases (asterisks); D and E: Percutaneous transhepatic cholangiopancreatic drainage shows a vine-like expansion of the intrahepatic bile duct (D, arrows) and segmental stenosis of the extrahepatic bile duct (E, arrows); F: A biliary biopsy was performed under fluoroscopy (arrows).