BO VEISLAND / SCIENCE PHOTO LIBRARY BO VEISLAND / SCIENCE PHOTO LIBRARY
Colon cancer locations. Cutaway artwork of the large intestine and rectum, with dots (black) showing the frequency and location of sites of colon cancer. The main function of the large intestine is to reabsorb water from food residues, which are then stored as faeces in the rectum (lower centre). Cancer of the colon, also known as colorectal cancer, is one of the most common cancers in the Western world. Symptoms include rectal bleeding and abdominal pain. Treatment is with surgery to remove the affected area.
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