Read article - An opinion piece by H. Gilbert Welch, professor of medicine and of the Dartmouth Institute for Health Policy and Clinical Practice, in which he discusses the problems with liquid biopsy tests. "The enthusiasm for finding things that might benefit people in the future ignores the fact that doing so can cause people to have problems now. In short, a bad test can do as much damage as a bad drug," says Welch. "Worrisome liquid biopsies will start a cascade of subsequent, not-so-simple tests and procedures. People will be hurt in the process."