Liquid biopsy is when a simple blood draw is performed in order to detect cancer cells (CTC) or mutated DNA fragments (ctDNA) free floating in the bloodstream that has been shed from the cancer's primary or secondary sites. This test has been heralded as an alternative way to make a diagnosis instead of an invasive surgical biopsy whether by needle or excision. Liquid biopsy has been developed mainly for detecting cancers of the breast, prostate, colon, ovarian, lung, and melanoma. Liqu…
