U.S. health regulators approved Guardant's Shield test, a blood test for colon cancer screening in average-risk adults, offering a noninvasive screening method alongside colonoscopies.
The test, detecting DNA fragments from tumors, caught 83% of cancers but missed some precancerous growths found by colonoscopy. It provides an alternative for those who avoid colonoscopies due to inconvenience or preparation hassles.
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