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Blood in the Stool (Rectal Bleeding) (cont.)

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Meckel's diverticulum

A Meckel's diverticulum is an out-pouching (sack) that protrudes from the small intestine near the junction of the small intestine and the colon. It is present from birth and occurs in a small percentage of the population. Some Meckel's diverticula can secrete acid, like the stomach, and the acid can cause ulcerations in the inner lining of the diverticulum or the tissues of the small intestine adjacent to the diverticulum. These ulcers can bleed. Bleeding from a Meckel's diverticulum is the most common cause of gastrointestinal bleeding in children and young adults. Bleeding from a Meckel's diverticulum is painless but can be brisk and can cause bright red, dark red, or maroon stools.

Polypectomy

Colon polyps found during colonoscopy usually are removed, a process called polypectomy. Bleeding can occur at the site of the polypectomy days to weeks after the polyp is removed. Such bleeding is called delayed post-polypectomy bleeding. Smaller polyps (2-3 mm in size) can be removed with biopsy forceps. The amount of blood loss from the use of a forceps usually is minute, and there will be no delayed bleeding. However, larger polyps (larger than 5-10 mm) usually are removed with an electro-surgical snare. These snares are connected to a machine that generates an electrical current. The polyp is looped within a snare, and electrical current is passed through the snare. The electrical current cuts off the polyp and cauterizes ("heat seals") the tissue at the base of the polyps. Cauterization prevents bleeding during polypectomy; however, the site of cauterization heals with the formation of an ulcer. Rarely, these ulcers can bleed several days to up to 2-3 weeks after polypectomy. Post-polypectomy bleeding can at times be brisk and severe, and can be bright red, dark red, maroon colored, or black.

Medically Reviewed by a Doctor on 7/16/2014

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Blood in the Stool - Experience Question: Please describe your experience with blood in the stool.
Blood in the Stool - Cause Question: What was the cause of blood in your stool?
Blood in the Stool - Diagnosis Question: What was the diagnosis of blood in the stool?
Blood in the Stool - Treatment Question: Depending on the cause, what was the treatment for blood in the stool?
Blood in the Stool - Hemorrhoids Question: Please describe your experience with hemorrhoids and blood in your stool.
Blood in the Stool - Anal Fissures Question: Please describe your experience with anal fissures and rectal bleeding.
Blood in the Stool - Other Causes Question: Which one of these were the cause of your case of rectal bleeding, and please describe your experience.
Blood in the Stool - Infection Question: What infection caused your case of rectal bleeding, and how was it treated?
Blood in the Stool - Ulcers or Gastritis Question: Was it ulcers or gastritis that caused your case of rectal bleeding, and how was it treated?
Blood in the Stool - Esophageal Bleeding Question: Please describe your experience with rectal bleeding and esophageal bleeding.
Blood in the Stool - Additional Causes Question: If not mentioned previously, what caused your case of rectal bleeding?
Blood in the Stool - Associated Symptoms Question: What symptoms did you have that occurred with rectal bleeding?
Source: MedicineNet.com
http://www.medicinenet.com/blood_in_the_stool_rectal_bleeding/article.htm

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