BILIARY STRICTURE DUE TO MUCOSAL HYPERPLASIA OF THE COMMON BILE-DUCT - A CASE-REPORT

A 71-year-old man with a tumorous lesion, of the common bile duct is p resented. Although histological examination, of tumor biopsy specimens taken at the time of duodenoscopy or percutaneous transhepatic choled ochoscopy showed mucosal hyperplasia, cancer could not be ruled out; t herefore, the patient underwent pancreatoduodenectomy. However, histol ogy showed nodular mucosal hyperplasia and an ectopic pancreas adjacen t to the papilla of Vater, which was suspected to have contributed to the development of the lesion by stimulating the mucosa of the papilla and the distal common bile duct.