Imaging Findings of Biliary Adenofibroma of the Liver: A Case Report

Biliary adenofibroma, an extremely rare benign liver tumor with potential malignancy, lacks well-established imaging features because of its scarcity. Here, we report the imaging findings in a case of biliary adenofibroma, focusing on its characteristic solid microcystic features. During the screening of a healthy 44-year-old male, a mostly solid echogenic mass resembling a cavernous hemangioma was found in the right lobe of the liver on ultrasound examination. Subsequent CT revealed a low-density mass with a central nodular area, and MRI scans revealed a mostly cystic mass comprising numerous microcysts with a honeycomb appearance and a small scar-like nodular soft tissue area. Following hepatic segmentectomy, histopathological examination confirmed the presence of a biliary adenofibroma. This review describes a pathologically confirmed case of biliary adenofibroma. This rare hepatic tumor resembles cavernous hemangiomas of the liver on ultrasonography and pancreatic serous cystadenomas on MRI.