右侧的溃疡正穿透肌层，接近一动脉。溃疡破坏动脉将导致另一个主要的并发症-出血，出血可威胁生命，而慢性失血将导致缺铁性贫血。
The ulcer at the right is penetrating through the muscularis and approaching an artery. Erosion of the ulcer into the artery will lead to another major complication of ulcers--hemorrhage. This hemorrhage can be life threatening. Chronic blood loss may lead to an iron deficiency anemia.
