Abstract
A 70-year-old man was admitted to our hospital because his serum ALP, LDH and γ-GTP levels were elevated. Ultrasonography and computed tomography showed a 3×3 cm mass in the head of the pancreas. A pancreatic malignancy was strongly suspected from other extensive investigations with MRI, ERP, MR-cholangiography, and abdominal angiography. At laparotomy, a firm mass was found around the intrapancreatic bile duct, and it had invaded to the replaced right hepatic artery, therefore pan creaticoduodenectomy was performed. The final histological diagnosis was malignant lymphoma of the common bile duct, follicular, mixed cell type with B-cell nature. The patient was healthy with no evidence of recurrence for 3 years. Primary lymphoma of the common bile duct is extremely rate, and there have been only four detailed reports in the literature previously.
