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Thousands of colon cancer cases were missed due to "unacceptable" test errors



T The study enrolled more than 120,000 men and women who underwent colonoscopy on all screening providers in England – the main colorectal cancer screening test at least six months after the all-clear.

The study showed an overall improvement between 2005 and 2013. In 2005, 9 percent of cases diagnosed with colorectal cancer had a negative result at a colonoscopy between six months and three years earlier – meaning they may have been diagnosed far earlier.

By 2013 it was 6.5 percent.

If the former number were the later standard, 3,900 bowel cancer cases would have been detected or even prevented over a nine-year period, according to the researchers. Colonoscopy colon cancer "three times higher than others, the study found.


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