It is the remnant of omphalomesenteric (vitelline) duct, which is usually located within 100 cm of the antimesenteric border of the terminal ileum.

• 出血因素为异位性胃黏膜溃疡所造成。电脑断层摄影可发现卵黄管遗迹似脂肪密度肿块充填于肠腔内。