Intrahepatic biliary cystadenoma: A case report

Figure 1 Computed tomography imaging of biliary cystadenoma. A: Non-contrast computed tomography (CT) showed multiple sizes of hypoattenuating shadows with nodular calcification and internal septations in the liver; B: Arterial phase of CT revealed no obvious enhancement; C: Venous phase of CT revealed slight enhancement; D: Delayed phase of CT showed internal septa and nodular calcification gradually and slight enhancement.

Figure 2 Axial and coronal sections from magnetic resonance imaging of the abdomen. A: Axial T1 weighted imaging showed cystic fluid with a low signal intensity; B: Axial corresponding T2 weighted imaging revealed cystic fluid with a high signal intensity; C: Coronal T2 weighted imaging showed that internal septation separated the fluid-filled spaces; D: Diffusion weighted imaging showed no abnormal signal; E: Apparent diffusion coefficient map revealed no abnormal signal at the same area; F: Magnetic resonance cholangiopancreatography showed multiple cystic lesions and diffuse dilatation of the biliary tree; G: Arterial phase of magnetic resonance imaging (MRI) revealed no obvious enhancement; H: Venous phase of MRI revealed slight enhancement; I: Delayed phase of MRI showed that the capsule wall contained internal separations with enhancement.

Figure 3 Pathological picture. The pathological picture showed that the cyst wall was accompanied by a monolayer columnar epithelium with fibrosis, calcification, and inflammatory cell infiltration. Typical ovarian-type stroma was absent.