Benign schwannoma of the hepatoduodenal ligament: a case report

We report a schwannoma of the hepatoduodenal ligament in a 43-year-old man who was diagnosed as hilar tumor and choledocholithiasis. He presented with repeatedly right upper quadrant swelling pain more than 7 years, aggravated in 1 month and had a previous history of gallbladder excision. His family history and physical examination were devoid of significance. Computed Tomography scan showed a mass about 4.0 cm in diameter in the portahepatis and multiple small stones in the lower segment of common bile duct. In surgery, two encapsulated mass were found and then two portahepatis tumor excision and choledocholithotomy were finally accomplished. The tumor tissue was found full of spindle cells and no typical appearance by pathological analysis. Immunohistologically, S-100 protein was positive in tumor cells and then the lesions were finally diagnosed as schwannoma.