Blood in stool
|Blood in stool|
|Classification and external resources|
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.
List of causes
Common causes of blood in the stool include:
- Anal fissure
- Colorectal cancer
- Crohns disease
- Ulcerative colitis
- Internal hemorrhoids
- Inflammatory enteritis - inflammation of the small intestine, which may be caused by various forms of food poisoning as well as by other conditions:
- Upper gastrointestinal bleeding
- Peptic ulcer disease
- Esophageal varices
- Gastric cancer
- "Colon Cancer Symptoms - What are Colon Cancer Symptoms". Coloncancer.about.com. 2009-01-20. Retrieved 2012-01-31.
- "Colon cancer: Symptoms". MayoClinic.com. 2011-08-13. Retrieved 2012-01-31.
- Lenz, Heinz-Josef (2009-03-06). "What are Early Symptoms of Colorectal Cancer? Watch out for Small Changes". Alexandria, Virginia, United States: Fight Colorectal Cancer. Archived from the original on 2009-03-10. Retrieved 2013-02-23.
- "Colon Cancer Symptoms - Colorectal Cancer Symptoms". Webmd.com. 2010-10-31. Retrieved 2012-01-31.
- "Crohn's Disease: Inflammatory Bowel Diseases (IBD): Merck Manual Home Edition". Merckmanuals.com. Retrieved 2012-01-31.
- "Crohn's disease: Symptoms". MayoClinic.com. 2011-08-09. Retrieved 2012-01-31.
- Travis SP, Higgins PD, Orchard T, Van Der Woude CJ, Panaccione R, Bitton A, O'Morain C, Panés J, Sturm A, Reinisch W, Kamm MA, D'Haens G (Jul 2011). "Review article: defining remission in ulcerative colitis". Aliment Pharmacol Ther (Review). 34 (2): 113–24. doi:10.1111/j.1365-2036.2011.04701.x. PMID 21615435.
- Walmsley, R S; Ayres, R C S; Pounder, R E; Allan, R N (1998). "A simple clinical colitis activity index". Gut. 43 (1): 29–32. doi:10.1136/gut.43.1.29. ISSN 0017-5749.
- Walmsley, R S; Ayres, R C S; Pounder, R E; Allan, R N (1998). "A simple clinical colitis activity index : Table One". Gut. 43 (1): 29–32. doi:10.1136/gut.43.1.29. ISSN 0017-5749. Retrieved 2016-05-24.
- Hemorrhoids, National Digestive Diseases Information Clearinghouse, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health.
- Hemorrhoids: Symptoms, Mayo Clinic.
- MedlinePlus Encyclopedia Enteritis
- MedlinePlus Encyclopedia E. coli enteritis
- MedlinePlus Encyclopedia Campylobacter infection
- Shigellosis, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention
- MedlinePlus Encyclopedia Salmonella enterocolitis
- "Salmonella infection: Symptoms". MayoClinic.com. 2011-04-16. Retrieved 2012-01-31.
- MedlinePlus Encyclopedia Bacterial gastroenteritis
- MedlinePlus Encyclopedia Radiation enteritis
- "Diverticulitis: Diverticular Disease: Merck Manual Home Edition". Merckmanuals.com. Retrieved 2012-01-31.
- Upper Gastrointestinal Bleeding at eMedicine
- "Peptic ulcer: Symptoms". MayoClinic.com. 2011-01-06. Retrieved 2012-01-31.
- "Esophageal varices: Symptoms". MayoClinic.com. 2010-10-30. Retrieved 2012-01-31.
- Gastric Cancer at eMedicine