Figure 3a. Gastric carcinoid tumors. (a) Contrast-enhanced arterial phase CT image shows a small avidly enhancing gastric nodule at the lesser curvature of the stomach (arrow). The nodule was histologically proved to be a type I tumor. (b) Contrast-enhanced CT image in another patient shows a large heterogeneous locally invasive mass that originated from the gastric cardia and surrounds the adjacent celiac artery (arrow). The tumor was resected and was proved at histologic analysis to be a type III gastric carcinoid tumor.