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Blood in stool looks different depending on how early it enters the digestive tract—and thus how much digestive action it has been exposed to—and how much there is. The term can refer either to melena, with a black appearance, typically originating from upper gastrointestinal bleeding; or to hematochezia, with a red color, typically originating from lower gastrointestinal bleeding. [6]
Gastrointestinal bleeding can range from small non-visible amounts, which are only detected by laboratory testing, to massive bleeding where bright red blood is passed and shock develops. Rapid bleeding may cause syncope. [ 18 ] The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding.
Human feces photographed in a toilet, shortly after defecation.. Human feces (American English) or faeces British English), commonly and in medical literature more often called stool, [1] are the solid or semisolid remains of food that could not be digested or absorbed in the small intestine of humans, but has been further broken down by bacteria in the large intestine.
Hemorrhoid, gastritis, gastrointestinal bleeding, stomach cancer. Hematochezia is a form of blood in stool, in which fresh blood passes through the anus while defecating. It differs from melena, which commonly refers to blood in stool originating from upper gastrointestinal bleeding (UGIB). [1] The term derives from Greek αἷμα ("blood ...
The conservation and restoration of human remains involves the long-term preservation and care of human remains in various forms which exist within museum collections. This category can include bones and soft tissues as well as ashes, hair, and teeth. [1] Given the organic nature of the human body, special steps must be taken to halt the ...
Crime scene cleanup is a term applied to cleanup of blood, bodily fluids, and other potentially infectious materials (OPIM). It is also referred to as biohazard remediation, and forensic cleanup, because crime scenes are only a portion of the situations in which biohazard cleaning is needed. Incidents which may require this type of cleanup ...
Feces is the scientific terminology, while the term stool is also commonly used in medical contexts. [30] Outside of scientific contexts, these terms are less common, with the most common layman's term being poop or poo. The term shit is also in common use, although it is widely considered vulgar or offensive. There are many other terms, see below.
Fecal occult blood testing (FOBT), as its name implies, aims to detect subtle blood loss in the gastrointestinal tract, anywhere from the mouth to the colon.Positive tests ("positive stool") may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding and warrant further investigation for peptic ulcers or a malignancy (such as colorectal cancer or gastric cancer).