In a lively discussion at the 40th annual J.P. Morgan Healthcare Conference, panelists from leading diagnostics companies debated the best way to screen for cancer – and whether diagnostic testing does more harm than good in some circumstances. Kevin Conroy, CEO of Exact Sciences Corp., noted that he expected liquid biopsies to have an “enormous impact on making earlier cancer detection a routine part of medical care” with his company currently developing a blood-based test for colon cancer as well as a multicancer test and one for minimal residual disease.