Primary coexisting adenocarcinoma of the colon and neuroendocrine tumor of the duodenum: A case report and review of the literature

Figure 2 Enhanced total abdominal computed tomography findings. A: Computed tomography (CT) plain scan of a mass in the duodenal bulb; B: Abnormal enhancement of the duodenal bulb (orange triangles); C and D: CT venous phase and CT venous delayed phase of the mass, respectively.