Mixed neuroendocrine-nonneuroendocrine neoplasm of the ampulla: Four case reports

Figure 1 Enhanced computed tomography of the abdomen of patient 4. A: The ampullary mass shown by the orange arrow protrudes into the duodenal cavity, and the arterial phase shows uneven enhancement; B: The tumor caused significant dilation of the bile ducts and pancreatic ducts inside and outside the liver; C: Postoperative liver metastases indicated by orange arrows.