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Blood in stool

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Title: Blood in stool  
Author: World Heritage Encyclopedia
Language: English
Subject: Hematochezia, Melena, Lower gastrointestinal bleeding, Gastrointestinal disease, List of ICD-9 codes 520–579: diseases of the digestive system
Collection: Blood, Feces
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Blood in stool

Blood in stool
Classification and external resources
Specialty Gastroenterology
ICD-9-CM 578.1
DiseasesDB 19317
MedlinePlus 003130

In medicine, when referring to human feces, blood in stool looks different depending on (1) how early it enters the intestines (and thus how much digestive action it has been exposed to) and on (2) how much there is (a little bit, more than a little, or a lot). This is why bright red blood in the stool has different clinical significance (and a different name) than brown or black blood in the stool. Thus the term can refer either to melena, with more blackish appearance, originating from upper gastrointestinal bleeding, or to hematochezia, with more red color, originating from lower gastrointestinal bleeding. The term "blood in stool" is usually not used to describe fecal occult blood, which refers to blood that is not visible and thus is found only after chemical testing is performed.

In infants, the Apt test can be used to distinguish fetal hemoglobin from maternal blood.

List of causes

Common causes of blood in the stool include:

See also

References

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