影像学检查主要表现为壶腹部肿物及胆、胰管扩张；
The main imagic characteristics were ampullary masses, dilations of biliary and pancreatic duct.
肿瘤大部分位于胰腺，多有完整包膜，不伴有胆总管和胰管扩张。
The tumor was mainly located in the pancreas with complete capsule, no common bile duct or pancreatic duct dilatation was accompanied.
我们进行了一项随机试验对胰管扩张内镜和外科治疗进行了对比研究。
We conducted a randomized trial to compare endoscopic and surgical drainage of the pancreatic duct.
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