Liquid Biopsy for Head and Neck Cancer cihara kenji Liquid biopsy is when a simple blood draw is performed in order to detect cancer cells (CTC) or mutated DNA fragments (ctDNA) free floating ... bloodcancercarcinomaheadhowhpvlaryngeallarynxliquid biopsymassneckoralsalivaspitsquamous cellthroattonguetonsil