DR. E. WALKER / SCIENCE PHOTO LIBRARY DR. E. WALKER / SCIENCE PHOTO LIBRARY
Cancer of large intestine. Cross-section of part of the large intestine (colon) affected by cancer (red area at centre). The colon is one of the most common sites where cancer develops. Cancer of the colon has no single cause but dietary and genetic factors may play an important role. A change in the bowel habits, such as constipation or diarrhoea, and blood mixed in the faeces are usually the first symptoms. Treatment depends on the stage of development of the cancer but in most cases a partial colectomy, the removal of part of the colon, is performed.
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