Imaging modalities are necessary for screening internal cancers, and liquid biopsies analyzing cell-free DNA with epigenetic signatures are emerging as an alternative.

“but for all other cancers that are inside the body you have to rely on some sort of Imaging modality um although now we're starting to look at things things called liquid biopsies so blood tests that are looking for self-free DNA and the self-free DNA gives us a sense of based on the epigenetic signature of what you're looking at hey is there a cancer in the body and if so what tissue is it potentially coming from based on these epigenetic signatures”