Abstract
A 69-year-old woman with a bile duct carcinoma associated with anomalous pancreaticobiliary ductal junction is described. The patient underwent cholecystectomy at a local hospital for acalculous cholecystitis 4 years previously. The anomalous junction was demonstrated by ERCP performed as a preoperative examination at that time, but the dilatation of the common bile duct was considered innocent. Right upper abdominal pain and general malaise brought the patient to our hospital, and thorough examinations revealed the carcinoma in the mid-portion of the common bile duct. Biopsy at percutaneous transhepatic choledochoscopy showed well-differentiated adenocarcinoma, and then bile duct resection and lymph node dissection were performed. This case seems note worthy to show a chronological factor of the development of bile duct cancer in patients with the anomalous pancreaticobiliary ductal junction.