JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Colon cancer. Artwork of a carcinoma (lower right) in the sigmoid region of the descending colon (part of the large intestine). The growth of the cancer on the intestinal walls has narrowed the intestines. Also shown are blood vessels (red and blue). Colon cancer is one of the most common cancers in North America and Western Europe. It is thought to be connected to a diet high in fat and low in fibre. Symptoms include rectal bleeding and abdominal pain. Treatment is with surgery to remove the affected area.
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