Molecular testing, including genetic testing,next-generation sequencing, and blood tests that measure tumor markerslike cytokeratin fragments and carcinoembryonic antigen, plays a crucialrole in comprehensive tumor analysis.29−32 However, these methods can beresource-intensive and may not be readily accessible for repeatedtesting, highlighting the need for noninvasive alternatives (Figure 1). This evidence concerns the gene CEACAM5 and neoplasm.