Imaging presentation of biliary adenofibroma: A case report

Figure 1 Imaging findings in a 68-year-old man with biliary adenofibroma. A: Ultrasonography showed hyperechoic nodules in the left lobe of the liver, after injection of contrast agent, it showed early and obvious enhancement; B and C: Plain magnetic resonance imaging (MRI) scan showed hypointensity on T1-weighted imaging (T1WI) and hyperintensity on T2-weighted imaging (T2WI); D and E: Diffusion-weighted imaging (DWI) showed moderate hyperintensity and isointensity on ADC; F-H: Enhanced MRI scan showed obvious enhancement of solid components and separation of lesions in the arterial phase, the degree of lesion enhancement decreased in the portal phase, in the hepatobiliary phase, enhancement of the bile duct structure was found in the lesion.

Figure 2 Postoperative pathology. Hematoxylin and eosin staining (100 ×) microscopy showed irregular hyperplasia of the bile duct with varying amounts of intervening fibrous stroma and inflammatory cell infiltration. Some bile ducts were dilated and the wall thickened, cholestasis can be seen in the bile duct. The cells showed no atypia, and some of them showed apocrine secretion. These results were consistent with the presentation of biliary adenofibroma.

Figure 3 Postoperative re-examination images. Ultrasound examination indicates uniform echogenicity of liver parenchyma with no obvious abnormal echogenicity