Colorectal cancer, also known as colon cancer, rectal cancer, or bowel cancer, is a cancer in the colon or rectum (parts of the large intestine), or in the appendix. Genetic analysis shows that essentially colon and rectal tumours are genetically the same cancer.[1] Symptoms of colorectal cancer typically include rectal bleeding and anemia which are sometimes associated with weight loss and changes in bowel habits (defecation pattern).
It is estimated that worldwide, 1.23 million new cases of colorectal cancer are clinically diagnosed and that it kills 608,000 people per year.[2]
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