Since left colic flexure is a segment of embryonic hindgut and the splenic artery typically supplies the foregut, the co本例中变异之动脉发源自供应前肠之脾动脉，再跨越了胚胎中肠部份，而供应原属于后肠发育出之结肠左曲，实为一种罕见的变异状况。