Establishment of a direct communication between the gallbladder and the duodenum. Synonym(s): duodenocholecystostomy, duodenocystostomy (1). [chole- + G. kystis, bladder, + L. duodenum + G. stoma, mouth]. /cho·le·cys·to·du·o·de·nos·to·my/ (-doo″o-dah-nos´tah-me) anastomosis of the gallbladder and duodenum.