ABSTRACT
Congenital anomalies of the gallbladder are rare; however, knowledge of such malformations is extremely important in the practice of both radiology and surgery. The spectrum of gallbladder duplication is broad. Incomplete longitudinal division of the gallbladder results in the bilobed or partially divided gallbladder. True duplication, however, is usually present in one of two forms: the true double gallbladder and the H-shaped gallbladder. Gallbladder triplication is extremely rare in humans. This chapter discusses three main types, which vary according to the number of cystic ducts and their insertion. The first type has three vesicles and three cystic ducts that fuse to form a common cystic duct before joining the common bile duct. In the second type, the cystic duct of two gallbladders fuse before joining the common duct, while the cystic duct of the third gallbladder enters the common duct separately. The third type consists of three vesicles whose individual cystic ducts join the common duct at separate locations.
