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www.reference.com/article/colon-cancer-affect-stool-68372246d8418c6c

Colon cancer affects the stool by causing alternating diarrhea and constipation, according to the American Cancer Society. This type of cancer can also cause narrowing of the stool and blood in the stool.

www.reference.com/article/causes-black-stools-other-colon-cancer-598e45f2b85f601a

Black stool is often caused by bleeding in the upper gastrointestinal tract, specifically in the esophagus, stomach or small intestines, notes Healthgrades. Medication and other ingested substances, including black licorice, blueberries, iron supplements, lead and bismu...

www.reference.com/article/colon-cancer-5642f7b9f7a60ccd

Colon cancer is cancer of the colon, according to Mayo Clinic. Colon cancer is also known as colorectal cancer, which refers to cancers that start in the colon and rectum. The colon is a part of the digestive system also known as the large intestine.

www.reference.com/article/causes-colon-cancer-64d7388fbdc28e70

Mayo Clinic explains that doctors are uncertain of the cause of colon cancer. Symptoms of colon cancer include blood in the stool, weight loss that cannot be explained, reoccurring cramps in the abdomen, variations in bowel movements and fatigue. If found early, colon c...

www.reference.com/article/causes-blood-stool-7151c4d5f75d99f9

Hemorrhoids, anal fissures, diverticulosis and colon polyps are the most common causes of blood in the stool, as confirmed by MedicineNet. Blood in the stool ranges in color from bright red to black.

www.reference.com/article/colon-cancer-c72faac39e4862f1

Age, race, gender, environment, diet and genetics are causative factors in the development of colon cancer, according to About.com, as are obesity, not getting enough exercise, smoking and polyps. Drinking alcohol can also place a person at risk of contracting this type...

www.reference.com/article/mucus-stool-sign-colon-problem-9f01b6d5537703c

Some mucus in the stool is perfectly natural, as mucus acts as a lubricant in the body, states Healthgrades. However, a great deal of mucus in the stool or mucus that is accompanied by symptoms such as blood, pain or diarrhea can indicate inflammation, bowel obstruction...