Concept

Rectal bleeding

Rectal bleeding refers to bleeding in the rectum. There are many causes of rectal hemorrhage, including inflamed hemorrhoids (which are dilated vessels in the perianal fat pads), rectal varices, proctitis (of various causes), stercoral ulcers and infections. Diagnosis is usually made by proctoscopy, which is an endoscopic test. Bleeding from the anus is termed anal hemorrhage and is usually superficial in nature.

Official source

https://en.wikipedia.org/wiki/Rectal_bleeding

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Related publications (4)

CDX2 expression dynamics in tumor clusters: a morpho-molecular biomarker in rectal cancer pretreatment biopsies revealed by sequential immunofluorescence

In rectal cancer, there is a need for improved pretreatment biomarkers applicable to biopsies. Tumor budding (TB) is a histological feature used in colon cancer and, due to its link to epithelial-mesenchymal transition (EMT), is hypothesized to be a potential marker for therapy resistance. As EMT-related processes are also seen in other morphological features beyond TB, we investigated epithelial marker downregulation in tumor tissue, as well as morphological features such as tumor cluster size and finger-l

Nature Research2026

Is detection of intraperitoneal exfoliated tumor cells after surgical resection of rectal cancer a prognostic factor of survival?

Paul Refinetti

Background: The prognostic significance of free cancer cells detected in peritoneal fluid at the time of rectal surgery remains unclear. A substantial number of patients will develop metastatic disease even with successful local treatment. This prospective ...

2017

Shear stress alterations in the celiac trunk of patients with a continuous-flow left ventricular assist device as shown by in-silico and in-vitro flow analyses

Alfio Quarteroni, Christian Vergara

BACKGROUND: The use of left ventricular assist devices (LVADs) to treat advanced cardiac heart failure is constantly increasing, although this device leads to high risk for gastrointestinal bleeding. METHODS: Using in-silico flow analysis, we quantified he ...

Elsevier Science Inc2017

Related concepts (3)

Rectum

The rectum (: rectums or recta) is the final straight portion of the large intestine in humans and some other mammals, and the gut in others. The adult human rectum is about long, and begins at the rectosigmoid junction (the end of the sigmoid colon) at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used. Its diameter is similar to that of the sigmoid colon at its commencement, but it is dilated near its termination, forming the rectal ampulla.

Lower gastrointestinal bleeding

Lower gastrointestinal bleeding, commonly abbreviated LGIB, is any form of gastrointestinal bleeding in the lower gastrointestinal tract. LGIB is a common reason for seeking medical attention at a hospital's emergency department. LGIB accounts for 30–40% of all gastrointestinal bleeding and is less common than upper gastrointestinal bleeding (UGIB). It is estimated that UGIB accounts for 100–200 per 100,000 cases versus 20–27 per 100,000 cases for LGIB.

Blood in stool

Blood in stool or rectal bleeding 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.

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