Effect of cholecystoduodenostomy and choledochostomy in pancreatic carcinogenesis.

The pancreatic carcinogen N-nitrosobis(2-oxopropyl)-amine was administered to Syrian golden hamsters after cholecystoduodenostomy and choledochostomy to investigate a possible bile reflux mechanism as a factor in pancreatic carcinogenesis. The induced lesions were similar in morphology, multiplicity, and distribution to those of animals in other studies without surgery. Hence the findings contraindicate the importance of biliary reflux in pancreatic tumor induction. Other possible mechanisms are discussed.