Melena - Ontology Browser - Rat Genome Database

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Melena (HP:0002249)
Annotations: Rat: (0) Mouse: (0) Human: (23) Chinchilla: (0) Bonobo: (0) Dog: (0) Squirrel: (0) Pig: (0)

Parent Terms

Term With Siblings

Child Terms

Bloody diarrhea + is-a

Gastrointestinal hemorrhage + is-a

Bloody mucoid diarrhea

Coffee ground vomitus

Hematemesis

Hematochezia

Intestinal bleeding +

Melena

The passage of blackish, tarry feces associated with gastrointestinal hemorrhage. Melena occurs if the blood remains in the colon long enough for it to be broken down by colonic bacteria. One degradation product, hematin, imbues the stool with a blackish color. Thus, melena generally occurs with bleeding from the upper gastrointestinal tract (e.g., stomach ulcers or duodenal ulcers), since the blood usually remains in the gut for a longer period of time than with lower gastrointestinal bleeding.

Synonyms
Narrow Synonyms:	Black faeces ; Black feces
Xrefs:	MESH:D008551 ; SNOMEDCT_US:249627005 ; SNOMEDCT_US:267055007 ; SNOMEDCT_US:269899009 ; SNOMEDCT_US:2901004 ; SNOMEDCT_US:35064005 ; UMLS:C0025222 ; UMLS:C0474585
Definition Sources:	https://orcid.org/0000-0002-0736-9199

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