PMC10351580_01
Abdominal computer tomography (CT) of the patient. Left arrow shows the dilated bile duct with a diameter of 2.1 cm. The right arrow indicates the tumor with a diameter of 4 cm.
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Computed tomography (CT) revealed intra- and extrahepatic biliary duct dilation; the maximum diameter of the common bile duct was 2.1 cm ( Figure 1 ). A 4-cm diameter cystic lesion was visualized in the caudate lobe of the liver ( Figure 1 ).
Abdominal magnetic resonance imaging (MRI) of the patient. Arrows show the dilated left and right bile ducts.
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T2WI images showed a hyperintense signal. Tubular dilation of the common bile duct and left hepatic duct in the hilum was observed ( Figure 2 ). The terminal wall of the common bile duct was slightly thickened with a stenosed lumen and blockage.
Abdominal magnetic resonance cholangiopancreatography (MRCP) of the patient. Arrow shows the blocked common bile duct.
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Sudden blockade of the terminal common bile duct ( Figure 3 ) and nodules on the magnetic resonance cholangiopancreatography (MRCP) ductal walls were observed.
Pathological image 1 (100x magnification) (A) Cystic tumor: the inner wall of the cyst is lined with mucoepithelial cells showing papillary arrangement with mucus in the cyst cavity. (B) Papillary structure in the cyst: cytoplasmic vacuoles and papillary structure with vascular axes could be seen. (C) Immunohistochemistry: Ki67 proliferation index was 40% positive.
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Pathological image 2 (400x magnification) (A) Tumor cytoplasm was stained red, which showed nuclear deviation, multisided arrangement, and mild cellular hyperplasia. (B) Papillary structure of the tumor. (C) vascular axes could be seen in the cytoplasm, which is the true papillary structure.
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