Microscopic transduodenal excision of an ampullary adenoma: A case report and review of the literature

Figure 1 Preoperative examination of the ampullary tumor. A and B: Contrast-enhanced computed tomography and magnetic resonance imaging showing an enhanced lesion (arrow) located in the descending part of the duodenum; C: Magnetic resonance cholangiography revealing a mild dilation of the common bile duct, and no cut-off sign or stricture of either the bile duct or pancreatic duct; D: Endoscopic view of the ampullary adenoma.