发生在十二指肠降部溃疡十分少见，笔者见１例，经手术及病理证实为十二指肠降部溃疡所致十二指肠梗阻，现作一报告分析。１病例介绍患者，男，４４岁，规律性上腹痛２０余年，多在夜间和饥饿时，进食后缓解，常伴有返酸、嗳气及黑便。近２０ｄ来症状加重，食之呕吐，呕吐... Occurred in the descending part of the duodenum ulcer is very rare, I see a case, confirmed by surgery and pathology duodenal descending ulcer caused by duodenal obstruction, is now a report analysis. 1 case description The patient, male, 44 years old, regular upper abdominal pain more than 20 years, mostly at night and when hungry, ease after eating, often accompanied by acid reflux, belching and melena. Over the past 20d to increase the symptoms, eating vomiting, vomiting ...