Fig. 1

a Computed tomography revealed a tumor in the splenic flexure of the colon, and the tumor had invaded the greater curvature of the stomach and the tail of the pancreas. The white arrows indicate gastrocolic fistula. The spleen was enlarged, and there was suspicion of tumor invasion to the splenic vein. b The tumor was mainly located in the splenic flexure of the colon, and except for the greater curvature where the tumor invaded, there were no obvious abnormalities in the stomach. The white, white dotted, and grey arrows indicate the stomach, gastrocolic fistula, and splenic flexure of the colon, respectively