Gallbladder cyst with an anomalous junction of the cystic duct

Gallbladder cyst is a rare entity. We herein report a case of gallbladder cyst with an anomalous junction of the cystic duct and review the literature. A 49-year-old woman was admitted to our hospital with cholecystolithiasis. Computed tomography (CT) and ultrasonography showed a few stones in the gallbladder. Multi-slice CT cholangiography showed an anomalous junction of the cystic duct which drained into the right hepatic bile duct. At surgery, a smooth mass-like lesion was noted at the fundus of the gallbladder. Laparoscopic cholecystectomy was performed without bile duct injury owing to the preoperative information on the cystic duct. The resected specimen showed a cystic lesion 3.0x2.5 cm in size at the fundus of the How to cite this art ic le: gallbladder filled with colorless mucus. Histopathologically, the inner surface of the cyst was lined by a single layer of columnar epithelium without dysplasia.