Cystic duct cyst: Report of one case

Cystic duct cyst is an extremely rare anomaly. The classification developed by Tadoni is used for the other bile duct anomalies, but cystic duct cysts are excluded from this classification. In this case report, acute pancreatitis was diagnosed based on the clinical and laboratory findings of the patient, who presented with a complaint of nonspecific abdominal pain. Cystic duct cyst was determined with magnetic resonance cholangiopancreatography performed after determination of a cystic lesion on the neck of the gallbladder by abdominal ultrasonography. Cystic duct cyst is an extremely rare anomaly, and advanced examination is required for the diagnosis.