A Case of Annular Stricture of the Common Hepatic Duct

Manabu Nishiwaki, Yoshinao Kotoura, Hiroshi Ashida, Akihiko Nishioka, Tamotsu Noshi, Michio Itoh, Naoki Hashimoto, Jyoji Utsunomiya

Second Department of Surgery, Hyogo College of Medicine

A 60-year-old Japanese woman suffered from upper abdominal discomfort and dilatation of the biliary tree was detected by abdominal ultrasonography. Percutaneous transhepatic cholangiographic drainage; endoscopic retrograde cholangio pancreatography, and computed tomography revealed septum formation of the common hepatic duct. Intraoperatively, we found stricture of the common hepatic duct, which had only a pinhole lumen. Cholecystectomy, partial resection and end-to-end anastomosis of the bile duct were performed. Histological examination revealed a thickness of muscular layer in the area of the stricture. And then, this case was diagnosed as an annular stricture of the extrahepatic duct, which is histologicaly different from septum formation. Annular stricture of the bile duct is very rare and it would be valuable to study the embryological anomaly in the biliary system.

Key words
annular stricture of the common hepatic duct, benign stricture of the common bile duct

Reprint requests
Manabu Nishiwaki Second Department of Surgery, Hyogo College of Medicine
1-1 Mukogawa-cho, Nishinomiya, 663 JAPAN

Accepted
September 9, 1992

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