hematochezia

n. passage of bloody stools (usually due to gastrointestinal bleeding)

Hematochezia is the passage of bright red, bloody stools from the rectum. It is distinguished from melena, which is stool with blood that has been altered by the gut flora and appears black/"tarry". Hematochezia is commonly associated with lower gastrointestinal bleeding.In adults, the most common causes are hemorrhoids and diverticulosis, both of which are relatively benign; however, it can also be caused by colorectal cancer, which is frequently fatal. In a newborn infant (neonate), hematochezia may be the result of swallowed maternal blood at the time of delivery, but can also be an initial symptom of necrotizing enterocolitis, a serious condition affecting premature infants. In adolescents and young adults, inflammatory bowel disease, particularly ulcerative colitis, is a serious cause of hematochezia that must be considered and excluded.
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Hematochezia /he·ma·to·che·zia/ defecation in which feces are bloody. he·ma·to·che·zi·a n. The passage of bloody stools. [more]Hematochezia - Community and Resources

Noun
1. passage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer)
(synonym) haematochezia
(hypernym) defecation, laxation, shitting