Double-cannulation and large papillary balloon dilation: key to successful endoscopic treatment of mirizzi syndrome in low insertion of cystic duct.

Mirizzi syndrome is a rare cause of benign biliary obstruction and is often predisposed by low insertion of the cystic duct on the common hepatic duct. Through a case series of three patients, we emphasize the importance of double cannulation (cystic duct and hepatic duct) followed by sphincterotomy and large balloon papillary dilatation for successful endoscopic stone clearance in such patients.