Pancreatic endocrine tumors are rare tumors classified into "functioning" and "nonfunctioning" tumors. A 68-year-old man was admitted to our hospital with the chief compliant of abdominal pain. Various imaging studies demonstrated a mass in the head of the pancreas with intraductal growth into the main pancreatic duct and an intraportal mass. The patient underwent a curative surgical operation. Histopathological examination revealed that it was nonfunctioning endocrine carcinoma of the pancreas. This is the first reported case of a pancreatic endocrine tumor with intraductal growth into the main pancreatic duct and tumor thrombus within the portal vein.

作者：Hiroshi, Kawakami；Masaki, Kuwatani；Satoshi, Hirano；Satoshi, Kondo；Yoshitsugu, Nakanishi；Tomoo, Itoh；Masahiro, Asaka

来源：Internal medicine (Tokyo, Japan) 2007 年 46卷 6期