A giant gallbladder.

A case of giant gallbladder is presented. A 36-yr-old female complaining of colicky pain and a mass in the right upper quadrant underwent cholecystectomy, when the giant gallbladder, 18 cm in length and 4 cm in maximum diameter, and an extremely long cystic duct was confirmed. Since neither marked biliary inflammation nor biliary obstruction was observed, this giant gallbladder is considered to be congenital.