Mayo Clinic has developed a screening procedure that could dramatically increase testing for Lynch syndrome, a hereditary genetic disorder that raises cancer risk, particularly for colorectal cancer. An estimated 3 percent of colon cancers can be attributed to Lynch syndrome. At least 80 percent of people with Lynch syndrome develop colorectal cancer, many of them before age 50. In the past, as few as 50 percent of patients who fit the profile for possible Lynch syndrome were tested before or after surgery... 
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