(American Society for Gastrointestinal Endoscopy) Researchers studied the rate of interval colorectal cancer in patients participating in the Polyp Prevention Trial Continued Follow-up Study and found that nine cases of colorectal cancer were diagnosed over 7,626 person-years of observation for an incidence rate of 1.2 per 1,000 person-years of observation.
Of patients in whom colorectal cancer developed, 78 percent had a history of advanced adenoma. The majority of the cancers detected were early stage and therefore highly curable.
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