1. Testing for the Lynch Syndrome in All Colorectal Cancer Patients Cost-effective Relatives of Those Who Test Positive Are at Increased Risk and Should Also be Tested The Lynch syndrome is the most common genetic cause of colorectal cancer and is also associated with endometrial and other types of cancer. While only three percent of colorectal cancer patients carry the gene, it has been suggested that testing for the Lynch syndrome in all patients newly diagnosed with colorectal cancer could help identify families at risk...
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