Adenomyoma of the common hepatic duct.

BACKGROUND: Adenomyoma occurs most commonly in the fundus of the gallbladder, seldom in other parts of the gallbladder and rarely in the extrahepatic biliary tree, where most lesions are localised to the common bile duct or papilla of Vater. Adenomyoma of the common hepatic duct is extremely rare. To the best of our knowledge, only three cases have been reported so far. CASE OUTLINE: A 51-year-old woman was admitted with a three month history of attacks of right upper abdominal pain, nausea, vomiting and fever. Laboratory data, ultrasonography, ERCP and CT confirmed slight cholestasis and proximal bile duct dilatation due to a tumour within the common hepatic duct. Cholecystectomy was performed with excision of the suprapancreatic common bile duct including the convergence of the hepatic ducts plus lymphadenectomy and Roux-en-Y hepaticojejunostomy. Frozen section histology showed the benign nature of the lesion and a tumour-free resection line. Final histology showed adenomyoma. The patient has remained symptom free for more than 30 months. DISCUSSION: Although adenomyoma is a benign lesion and the surgical strategy has not been established, complete excision with frozen section is recommended to exclude small malignant foci and local recurrence as well as to avoid surgical over-treatment.