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 diagnostic problems. We present imaging findings of a double gallbladder including coronal reformatted computed tomographic sections, to our knowledge not previously presented, and discuss the radiologic signs that may be helpful in diagnosis. We also present another case of a double gallbladder in which only one gallbladder was imaged 10 years after cholecystectomy.