gastroanastomosis

noun

gas·​tro·​anas·​to·​mo·​sis ˌga-(ˌ)strō-ə-ˌnas-tə-ˈmō-səs 

plural gastroanastomoses -ˌsēz 

: the formation by surgical means of a communication between the pyloric and cardiac ends of the stomach when the normal channel is obstructed or contracted