A case of inflammatory pseudotumor of the cystic duct

Abstract

Among benign tumors of the gallbladder, inflammatory pseudotumor has rarely been reported. An 88-year-old man with fever and right hypochondralgia was admitted. Previously he had suffered from chronic renal failure and renal anemia. Laboratory data on admission revealed anemia and renal disorder. Adominal ultrasonography revealed swelling of the gallbladder, debris, thickening of the gallbladder wall, and dilatation of the intrahepatic bile duct. Computed tomography showed swelling and thickening of the gallbladder wall. Magnetic resonance cholangiopancreatograhy visualized stenosis of the common bile duct and dilatation of the intrahepatic bile duct. On operation, an elastic soft mass of the neck of the gallbladder was involved in the common bile duct. Biliary tract reconstruction and cholecystectomy were performed. Histopathologically, infiltration of inflammatory cells, proliferation of fibrosis, and granulation with increase of small vessels were recognized. No malignancy was confirmed and inflammatory pseudotumor of the gallbladder was diagnosed. The patient died due to renal failure two months after the operation.