duodenocystostomy du·o·de·no·cys·tos·to·my (d&oomacr;'ə-dē'nō-sĭ-stŏs'tə-mē, dy&oomacr;'-, d&oomacr;-ŏd'n-ō-, dy&oomacr;-) n. See duodenocholecystostomy.