Posted by Kate Murphy on January 4th, 2010
While colonoscopy is effective in preventing cancers and advanced polyps in the lower part of the colon and rectum, it is less successful in stopping them in the right side or upper colon.
Looking back at almost 3,300 colonoscopies performed in community gastroenterology practices in Germany, researchers found a substantial reduction in large polyps or cancers in the left side of the colon and rectum among patients who had had a colonoscopy in the past ten years compared to those who hadn’t had one.
However, in the upper part of the colon, risk for an advanced polyp or cancer was the same whether or not the patient had a previous colonoscopy.
Overall, colonoscopy reduced the risk of a cancer or an advanced adenoma by 50 percent.
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