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Whether surgeons slice with a traditional scalpel or cut away with a surgical laser, most medical operations end up removing some healthy tissue, along with the bad. This means that for delicate areas like the brain, throat, and digestive tract, physicians and patients have to balance the benefits of treatment against possible collateral damage.

Consumer Reports investigation revealed that most medical implants are not tested before being implanted and are often "grandfathered" in

According to an investigation by Consumer Reports, most medical implants have never been tested for safety. CBS News correspondent Elaine Quijano reports.