Giant staghorn common bile duct calculus.

Background - Stones in common bile duct are defined as 'large' if they are more than 15 mm in size. There are very few reports which describe a giant stone measuring 5 cm or more and exceptionally a staghorn calculus in the common bile duct. Purpose - The purpose is to report a new rare case of giant staghorn gallstone and discuss the diagnostic approach and therapeutic possibilities. Case report - We report a case of a giant staghorn common bile duct calculus in a 65-year-old patient. Its removal required 2 operations and an endoscopic retrograde cholangiopancreatography with endoscopic sphincterotomy. Conclusion - Lithiasis of the common bile duct is considered to be a benign, but may sometimes be complicated and time-consuming. Staghorn calculi are very rare in the biliary tract. We found only two published reports of staghorn common bile duct calculi.