Oncocytic Type Intraductal Papillary Mucinous Carcinoma Complicated with Pancreaticobiliary Maljunction

• Published in: The Japanese Journal of Gastroenterological Surgery Vol. 46; no. 1; pp. 64 - 70
• Main Authors: Honda, Masayuki, Kato, Yuichiro, Gotohda, Naoto, Kinoshita, Takahiro, Takahashi, Shinichiro, Kojima, Motohiro, Konishi, Masaru
• Format: Journal Article
• Language: Japanese
• Published: The Japanese Society of Gastroenterological Surgery 01.01.2013
• Subjects: IPMN; oncocytic; PBM
• ISSN: 0386-9768; 1348-9372
• DOI: 10.5833/jjgs.2011.0079

We report a resected case of oncocytic type intraductal papillary carcinoma (IPMC) of the pancreas head complicated with pancreaticobiliary maljunction (PBM). A 67-year-old man was admitted for liver dysfunction. Detailed investigations revealed a papillary tumor from the lower bile duct to the papilla of Vater, and biopsy showed a moderately differentiated adenocarcinoma. Subtotal stomach-preserving pancreaticoduodenectomy was performed. The resected specimen revealed that the cyst-shaped common bile duct joined the pancreatic duct, and there was a pancreaticobiliary maljunction with the common channel of 2 cm. The papillary tumor, which had originated from the pancreatic duct or the common channel, grew through the pancreatic duct and protruded into the common bile duct and the papilla of Vater. No report of oncocytic type IPMC with PBM has been made, as far as we know. In this case, it is easy to misdiagnose the tumor as lower bile duct carcinoma, so careful attention is necessary to diagnose it.