Colorectal cancer (CRC), also known as bowel cancer, colon cancer, or rectal cancer, is the development of cancer from the colon or rectum (parts of the large intestine). Signs and symptoms may include blood in the stool, a change in bowel movements, weight loss, and fatigue.Most colorectal cancers are due to old age and lifestyle factors, with only a small number of cases due to underlying genetic disorders. [Source: Wikipedia 
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