Colon Cancer
Definition
Colon, or colorectal, cancer is cancer that starts in the large intestine (colon) or the rectum (end of the colon).
Other types of cancer can affect the colon, such as lymphoma, carcinoid tumors, melanoma, and sarcomas. These are rare. In this article, use of the term "colon cancer" refers to colon carcinoma only.
Symptoms
Many cases of colon cancer have no symptoms. The following symptoms, however, may indicate colon cancer:
* Abdominal pain and tenderness in the lower abdomen
* Blood in the stool
* Diarrhea, constipation, or other change in bowel habits
* Intestinal obstruction
* Narrow stools
* Unexplained anemia
* Weight loss with no known reason
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