Source:http://linkedlifedata.com/resource/umls/id/C0017181
MSH: Bleeding in any segment of the GASTROINTESTINAL TRACT from ESOPHAGUS to RECTUM.,CSP: escape of blood from the vessels, or bleeding, in the gastrointestinal tract.,NCI: Bleeding originating from any part of the gastrointestinal system.,MEDLINEPLUS: <p>Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum and anus. Bleeding can come from one or more of these areas. The amount of bleeding can be so small that only a lab test can find it. </p><p>GI bleeding is not a disease, but a symptom of a disease. There are many possible causes of GI bleeding, including</p><ul> <li><a href='http://www.nlm.nih.gov/medlineplus/hemorrhoids.html'>Hemorrhoids</a></li> <li><a href='http://www.nlm.nih.gov/medlineplus/pepticulcer.html'>Peptic ulcers</a></li> <li>Tears or inflammation in the esophagus</li> <li><a href='http://www.nlm.nih.gov/medlineplus/diverticulosisanddiverticulitis.html'>Diverticulosis and diverticulitis</a></li> <li><a href='http://ww