Abstract
An 85-year-old man was seen at the hospital because of sudden abdominal pain in right upper quatant(RUQ) and vomitting. Tenderness and rebound  were present around RUQ and Murphy sign was positive. Blood chemistry was normal except for WBC of 10,260/μl and CRP of 2.1mg/dl. Abdominal Ultrasonography showed swelling of the gallbladder with thickened wall and the cystic duct was not visualized. CT showed twisted pedicle of the cystic duct and the gallbladder shifted caudally. The gallbladder torsion was diagnosed and emergency open cholecystectomy was performed. During surgery, the Gross type-Ⅱ floating gallbladder was twisted counter-clockwise by 720 degrees and the adhension band to the gallbladder caused its torsion. The patient was discharged without any troubles. 
We experienced this rare case of the gallbladder torsion and report it with the consideration based on present case reports.