A Case of Adenomyomatous Hyperplasia of the Extrahepatic Bile Duct

• Main Authors: Masakatsu Numata, Soichiro Morinaga, Takuo Watanabe, Hiroshi Tamagawa, Naoto Yamamoto, Manabu Shiozawa, Yoichi Kameda, Shinichi Ohkawa, Yasushi Rino, Makoto Akaike, Munetaka Masuda
• Format: Article
• Language: English
• Published: Karger Publishers 2011-08-01
• Series: Case Reports in Gastroenterology
• Subjects: Adenomyomatous hyperplasia; Extrahepatic bile duct; Benign tumor
• Online Access: http://www.karger.com/Article/FullText/331052

Adenomyomatous hyperplasia is rarely found in the extrahepatic bile duct. A 54-year-old man was referred to our center with a diagnosis of extrahepatic bile duct stenosis which had been detected by endoscopic retrograde choloangiopancreatography. Abdominal computed tomography revealed thickening of the wall of the middle extrahepatic bile duct, however no malignant cells were detected by cytology. Since bile duct carcinoma could not be ruled out, we performed resection of the extrahepatic duct accompanied by lymph node dissection. Histopathologically, the lesion was diagnosed as adenomyomatous hyperplasia of the extrahepatic bile duct. Present and previously reported cases showed the difficulty of making a diagnosis of adenomyomatous hyperplasia of the extrahepatic bile duct preoperatively or intraoperatively. Therefore, when adenomyomatous hyperplasia is suspected, a radical surgical procedure according to malignant disease may be necessary for definitive diagnosis.