A technique for the removal of gallbladders and anomalies of the biliary ducts which are totally intrahepatic has rarely been described. Early attempts to excise these structures were complicated by hemorrhage from the liver. A drainage procedure has usually been considered the safest method of management. Recently we resected a large cyst-like structure of the common hepatic duct from within the right lobe of the liver. It was elected to call this structure a diverticulum after careful histological study and consultation.1,3 Since the diverticulectomy and the reconstruction of the hepatic duct were performed without complication, the procedure is described in detail. Report of Case A 45-year-old male was admitted to the Veterans Administration Hospital with recurrent pain in the subxyphoid and right subcostal regions of his abdomen for 20 years. Despite seven hospitalizations for recurrent attacks of pain, nausea, and vomiting, the cause of symptoms was not determined. The