1.a condition characterized by the production of black stools that are caused by bleeding into the bowel and the subsequent chemical changes in the blood effected by the bowel fluids
1.She suffered from melena, indicative of a haemorrhage in the upper gastrointestinal tract.
她遭受了黑，表明出血在上消化道。
2.if the cancer can cause gastrointestinal erosion hematemesis, melena .
如果癌肿侵蚀胃肠可引起呕血、黑便。
3.There are also some patients with liver cirrhosis showed a number of complications, such as melena, hematemesis .
也有部分患者表现为肝硬化的一些并发症，如黑便、呕血。
4.OBSERVATION: A 61 year-old man presented with anemia due to martial deficiency and melena, the endoscopic examination of which was negative.
观察：一名61岁男子介绍，由于贫血症和黑武术的内视镜检查的是消极的。
5.Results: Small intestinal tumors with gastrointestinal bleeding had the following clinical characteristics: (1) Melena was more common;
结果：以消化道出血为主要症状的原发性小肠肿瘤的临床特点：（1）以便血为主；
6.Constipation diarrhea hematemesis melena hematochezia jaundice
便秘腹泻呕血黑便便血黄疸
7.Cause analysis of the elder melena under colonoscope
老年便血病人结肠镜下的病因分析