Two patients with signs of an obstructed main bile duct underwent surg
ery. Choleductectomy was performed followed by Mirizzi exploration. Ex
temporaneous pathology examination of the intra-ductal tissue revealed
benign adenoma of the main bile duct. Resection of the main bile duct
with hepato-duodenal anastomosis was performed in the first patient a
nd resection with end-to-end anastomosis in the second.