Fig. 1

Images at admission of local hospital. a Contrast-enhanced abdominal computed tomography (CT) showed the tumor was mosaic enhancement, measured 65 × 61 mm in the hepatic segments 4 and 5 and 8. b Contrast-enhanced abdominal CT showed the tumor was attached to the biliary confluence, bifurcation of anterior–posterior Glissonian (yellow arrow) and right portal vein trunk. It was suspected to invasion to the left portal vein trunk, left intrahepatic bile duct and middle hepatic vein. c Magnetic resonance imaging (MRI) showed the tumor was hypointense on T1-weighted images. The margin of the tumor was unclear. d ¹⁸F-fluorodeoxyglucose (FDG)-positron emission tomography/computed tomography showed high FDG uptake of tumor with standardized uptake value-max of 11.15