PMC10097958_01
Typical images of contrast-enhanced computed tomography of the liver lesions. (A) The arterial phase image of the liver lesions. (B) The venous phase image of the liver lesions.
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No obvious discontinuity or filling defect was found in the portal vein branch and trunk, and the presence of a cancer thrombus was not considered ( Figure 1 ).
Typical images of magnetic resonance imaging of the liver lesions. (A) The arterial phase image of the liver lesions. (B) The T2 phase image of the liver lesions. (C) The DWI phase image of the liver lesions. DWI, diffusion-weighted imaging.
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T2-like filling defects and high signal intensity on diffusion-weighted imaging (DWI). The wall of the gallbladder was thickened and markedly enhanced, and several slightly larger lymph nodes were seen in the hilar region ( Figure 2 ). The tube placed due to endoscopic nasobiliary drainage was visible on both CT and MRI.
Macroscopic image of the specimen with the tumor within the common bile duct.
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The excised tissue specimen showed a polypoid mass in the common bile duct, which extended along the bile duct to the intrahepatic bile duct, and part of it was suspected to be necrotic ( Figure 3 ).
Microscopic examination of the resected specimen showing mucinous cystic neoplasm with low-grade intraepithelial neoplasia.
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Figure 4 ). Finally, we reached a pathological diagnosis of mucinous cystic neoplasm with low-grade intraepithelial neoplasia (Biliary cystadenoma).