Fig. 2

Ampullary tumors. Contrast-enhanced CT (a, b) reveals an enhancing soft-tissue mass (arrows), originating in the medial wall of the descending duodenum. This was a case of an ampullary adenocarcinoma. Contrast-enhanced CT of another patient with an ampullary carcinoma (c), shows a soft-tissue mass (arrow) originating in the medial wall of the descending duodenum and protruding into the water-filled duodenum. ERCP (d) revealed an enlarged and irregular suspicious papilla (curved arrow) and CBD dilatation (arrows). MRCP (e) of another patient shows dilatation of the CBD and intra-hepatic ducts (arrows) due to an abrupt stop at the distal CBD (curved arrow), which was caused by an ampullary villous adenoma