BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Colon cancer. Colored X-ray showing cancer of the colon. The colon, together with the much smaller rectum, forms the large intestine. The tumor cannot be directly seen in this x-ray but its growth (indicated by the area in red) has narrowed the colon and may be obstructing the passage of faeces. Other possible symptoms include blood in the faeces or lower abdominal pain. Cancer is the uncontrolled growth of cells within the body. Generally colonic cancer is treated by removing the diseased section of the colon and sewing the cut ends together. This procedure is known as a colectomy.
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