Abstract
A 65-year-old man was referred to our hospital with localized intrahepatic bile duct dilatation of segment 6. Endoscopic retrograde cholangiopancreatography (ERCP) showed localized stenosis and distal dilatation of the bile duct in liver segment 6. A computed tomography (CT) scan did not reveal any space occupying lesion. Endoscopic nasobiliary drainage (ENBD) was placed in dilated B6 for cytology of the bile juice, which revealed no malignancy 6 times. PET imaging did not show abnormal FDG accumulation. The patient was diagnosed to have inflammatory bile duct stenosis and was followed-up. During the follow-up period, CA19-9 increased gradually, and a tumor in S6 became evident on abdominal CT scan. The patient underwent posterior sectionectomy of the liver 11 months after the first consultation. The histopathological diagnosis was moderately-differentiated tubular adenocarcinoma. This case is reported because it demonstrates the importance of close follow-up of localized intrahepatic bile duct dilatation.
