Discussion:
H epatic peribiliary cysts are reported to occur due to obstruction of the outflow tract of the peribiliary glands caused by alcohol, inflammation, or bile duct blood flow disorders [1]. A review of 1,000 autopsy reports showed that hepatic peribiliary cysts predominantly affect men and have a prevalence of 5% in normal liver [6]. As the peribiliary glands develop along the left branch of the intrahepatic bile duct, serous cysts are characteristically present in the left liver lobe near the porta hepatis and around the large bile ducts in a beaded pattern [6]. Therefore, to diagnose a hepatic peribiliary cyst, it is important to demonstrate the absence of bile duct traffic to the cysts by endoscopic retrograde cholangiopancreatography or drip infusion cholecystocholangiography CT, and to rule out malignancy by cytological diagnosis. Histopathologically, hepatic peribiliary cysts are lined by a single layer of columnar epithelium without atypia; however, there is a report of hepatobiliary cystadenoma and cystadenocarcinoma in the peribiliary gland being mistakenly followed up as hepatic peribiliary cysts