A Resected Case of Inflammatory Myofibroblastic Tumor (Inflammatory Pseudotumor) of the Common Bile Duct

Hidenori Kusumoto, Tsunekazu Mizushima, Toshikazu Ito, Hitoshi Mizuno, Yuko Udatsu, Yasuaki Miyazaki, Tomo Nakagawa, Masayoshi Imakita¹⁾, Kazuhiro Iwase²⁾ and Masaaki Izukura

Department of Surgery and Department of Pathology¹⁾, Rinku General Medical Center, Izumisano Municipal Hospital
Department of Surgery, Osaka General Medical Center²⁾

A 76-year-old man admitted for hyperbilirubinemia was found in computed tomography (CT) to have a common bile duct (CBD) mass, and a dilated intrahepatic and CBD. Endoscopic retrograde cholangio-pancreatography showed stenosis of the CBD. Cytological examination of bile showed no malignancy. Pyrolus-preserving pancreaticoduodenectomy was conducted bases on a diagnosis of CBD tumor. Histologically, inflammatory cells but no malignancies were found, yielding a definitive diagnosis of inflammatory pseudotumor (IPT). Only 14 such cases originating in the extrahepatic bile duct have been reported previously. IPT is now recognized as IMT, a true neoplasm, necessitating new diagnostic measures.

Key words
common bile duct, inflammatory myofibroblastic tumor, inflammatory pseudotumor

Reprint requests
Masaaki Izukura Department of Surgery, Rinku General Medical Center, Izumisano Municipal Hospital
2-23 Rinku Ohrai Kita, Izumisano, 598-0048 JAPAN

Accepted
July 23, 2008

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