Case for Testing Cancer in Blood Builds, One Study at a Time

“Two new studies published on Wednesday of patients with breast and prostate cancers add to growing evidence that detecting bits of cancer DNA circulating in the blood can guide patient treatment.

“Enthusiasm is building for ‘liquid biopsies,’ which offer a non-invasive alternative to standard tissue biopsies and are expected to be a multibillion-dollar market.

“But a key question remains: Do they really work?

“The stakes are high. At least 38 companies are working on liquid biopsies for cancer, according to analysts at investment bank PiperJaffray, who think the U.S. market alone could eventually reach $29 billion a year.”