A major health company is combining efforts with researchers on a blood test they think has the potential to transform care of many types of cancer, especially breast, colon, prostate and lung cancer.
Johnson & Johnson plans to help get the test to market eventually. It can spot a single cancer cell among a billion healthy ones.
Doctors hope to use it to determine what treatment would be best for a particular tumor, and to find out quickly if the treatment is working. Ultimately, the test may offer another way to screen for cancer besides the mammograms, colonoscopies and other methods used now. But that will require more study.