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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/world-view/symptoms-colon-cancer-79c6f3e514029322

According to Mayo Clinic, symptoms of colon cancer include rectal bleeding, persistent abdominal discomfort, unexplained weight loss, weakness or fatigue, the feeling that one's bowels do not completely empty and notable changes in bowel habits, including diarrhea or a ...

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/symptoms-black-stool-cancer-92eaa13c1bdeb096

Symptoms of black stool cancer, or bowel cancer, include bloody stools, a change in bowel habits, weight loss and a cancerous lump, reports Cancer Research UK. An abnormally low level of red blood cells, or anemia, may be present as well.

www.reference.com/article/colon-cancer-symptoms-painful-c8ddc9f03c0c7260

Persistent abdominal pain, sometimes associated with gas or cramps, may occur in patients with colon cancer, states Mayo Clinic. In the early stages of the disease, there are often no symptoms. When symptoms occur, they vary depending on the size of the cancer and its l...

www.reference.com/article/early-symptoms-colon-cancer-6410f15ae8871715

There are no symptoms during the early stages of colon cancer, according to the American Cancer Society. For this reason, the ACS recommends doctors screen men and women for this disease when they reach age 50. Those with a family history of this cancer begin screenings...

www.reference.com/article/common-colon-cancer-symptoms-3dc6af1dcc7b1163

The most common symptoms of colon cancer include blood in the stool, changes in bowel behavior such as diarrhea or constipation, unexplained weight loss, or general fatigue and weakness, according to Mayo Clinic. Many people with early-stage colon cancer experience no s...