Fig. 1From: A case of idiopathic retroperitoneal fibrosis presenting as gallbladder carcinomaCharacteristics of the abdominal CT scan. Abdominal computed tomography scan showing the gallbladder occupying and involving the hilar bile duct and dilatation of the proximal biliary system (a); posterior peritoneal mass occupying/involving the upper part of the bilateral ureter (b), and the change in the proximal urinary tract (c)Back to article page