Gallbladder duplication: imaging findings and differential considerations

Duplication of the gallbladder, a rare congenital anomaly, is important in clinical practice because it may cause some clinical, surgical, and diagnos tic problems. We present imaging findings of a double gallbladder including coronal reformatted computed tomographic sections, to our knowledge not pr eviously presented, and discuss the radiologic signs that may be helpful in diagnosis. We also present another case of a double gallbladder in which o nly one gallbladder was imaged 10 years after cholecystectomy.