Abstract
A 61-year-old woman was diagnosed, 8 years prior, as having a solitary hepatic cyst with septum formation on abdominal echography. During the previous 8-year period, the patient was followed by echography ; no particular changes were noted. However, she developed abdominal distention. Computed tomography (CT) revealed a solitary multilocular cyst with papillary proliferation in segment S3 of the liver. Endoscopic retrograde cholangiopancreatography revealed an abundance of mucin in the intrahepatic bile duct. The diagnosis based on cytology was adenocarcinoma. A left hepatic lobectomy with lymph node dissection was performed ; on pathology was a diagnosis of a pancreatobiliary type of intraductal papillary neoplasm of the bile duct (IPNB) was made. The differential diagnosis of a suspected solitary hepatic cyst should include IPNB. Patients with a solitary hepatic cyst should have appropriate follow-up care so that surgery can be performed in a timely manner if necessary.
