case_images: PMC9852751_01
case_images: Contrast-enhanced CT findings. (A) plain scan, (B) arterial, (C) portal and (D) equilibrium phases, respectively. The CT scan shows a honeycomb-like cystic-solid lesion in segment 6 of the liver (white arrow). The cystic components show no enhancement during the arterial phase. The solid components are more enhanced compared with the normal hepatic parenchyma in the arterial and portal phases and are consistent with the normal hepatic parenchyma in the equilibrium phase.
case_images: fsurg-09-1074899-g001.jpg
case_images: PMC9852751_01_fsurg-09-1074899-g001.jpg
case_images: F1
case_images: Abdominal contrast-enhanced computed tomography (CT) scans (Figure 1) showed a honeycomb-like cystic-solid lesion with a tubulocystic manifestation lacking well-defined borders in S6 and no dilation of the major intrahepatic bile duct in the background liver.
case_images: MRI findings of a lesion that is an irregular tubular (A) low-density area on T1 and (B) high-intensity area on T2. (C) and (D) MRCP findings of the mass that does not communicate with the bile duct. The intrahepatic and extrahepatic bile ducts are not dilated.
case_images: fsurg-09-1074899-g002.jpg
case_images: PMC9852751_01_fsurg-09-1074899-g002.jpg
case_images: F2
case_images: Imaging examination did not reveal any bile duct stones (Figure 2).
case_images: The surgical specimen (A) shows a nodular mass with a gray-white honeycomb-like cystic-solid lesion observed in one section. Hematoxylin and eosin staining under (B) low-power microscopy displaying cystically dilated ductal and irregularly angulated structures along with bile-stained materials observed in some ducts, and (C) high-power microscopy showing that the ductal epithelium is composed of monolayered columnar and cuboidal epithelium. Normal hepatocytes are observed between the cystic ducts. (D) Immunohistochemistry showing CK7 and CK19 positivity in the dilated duct epithelium.
case_images: fsurg-09-1074899-g003.jpg
case_images: PMC9852751_01_fsurg-09-1074899-g003.jpg
case_images: F3
case_images: Ki-67 antigen staining revealed the proliferative activity of individual cells (Figure 3).