Bowel cancer is a general term for cancer that begins in the large bowel.
Depending on where the cancer starts, bowel cancer is sometimes called colon cancer or rectal cancer.
Symptoms of bowel cancer include blood in your stools (faeces), an unexplained change in your bowel habits, such as prolonged diarrhoea or constipation, and unexplained weight loss.
Cancer can sometimes start in the small bowel (small intestine), but small bowel cancer is much rarer than large bowel cancer.
Source: Cancer Research UK
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