Your original comment stated: > They won't work for in situ tumors, almost by definition. Which isn't true. The studies from multiple companies' tests demonst

Your original comment stated: > They won't work for in situ tumors, almost by definition. Which isn't true. The studies from multiple companies' tests demonstrate that they _can_ detect in situ tumors. Not always super duper well, and not always for every single cancer type, but still. Whether this is a good idea / cost-effective is another question, and certainly a big deal as you point out.