[A case of pancreatic cancer with invasion to the wall of the intrahepatic bile duct]. 
Presented here is the case of a 69-year-old woman with pancreatic cancer.  Efforts were made to discover the origin of the cancer but without success.  Tumor nodules were scarcely observed in the pancreas macroscopically at autopsy, while histological examination of the pancreas revealed the presence of a well-differentiated adenocarcinoma (duct cell carcinoma).  The invasion to the wall of the intrahepatic bile duct was also observed microscopically.