Abstract
The pancreatogram of 2 cases of pancreatic cystadenoma and 2 cases of pancreatic cystadenocarcinoma, were studied. The pancreatogram of these diseases showed local stenosis or obstruction of the main pancreatic duct, so, it was difficult to distinguish these diseases from pancreatic carcinoma. When the main pancreatic duct showed cystic dilatation, it was difficult to distinguish from pancreatic cyst.