Abstract:

　　Objective: To investigate anatomic features of fetal pancreaticobiliary and duodenal papilla. Methods: 36 foetus with the fetal ages of 4 to 9 months, 6 hours after death by induction of labor with water bag, were studied. The gallbladder, common bile duct, pancreatic duct and duodenum of them were removed and preserved in 10% buffered formaldehyde solution for 24 hours. The location and shape of the greater duodenal papilla were observed, and then serial sections of the specimens, with the thickness of 6 μm, were performed and HE stained, and followed by the observation of the union of pancreatic and bile common ducts under the microscope. Results: 1) Major duodenal papilla showed the shapes of hemispheroid(58.1%), circular cylinder(25%) and applanation(16.9%), which located at the upper pars descendens duodenum (8.3%)，the middle pars descendens duodenum(69.4%)，the lower pars descendens duodenum(19.4%) or the farer(2.9%). 2)The types of pancreaticobiliary ductal union could be classified into four types: "Y" in 24 specimens(66.7%), "U" in 4 specimens（11.1%） ,"V" in 7 specimens（19.4%） and APBDU type in 1 specimens（2.8%）. Conclusions: Pancreaticobiliary ductal union is variable and individual.

Key words: the pancreaticobiliary ductal union, nduction of labor with water bag, foetus, the greater duodenal papill