A new genetic test can tell doctors which breast cancer patients need to undergo the discomfort of chemotherapy -- and suggests many women don’t need to, researchers said on Friday. Almost half of U.S. women diagnosed with a specific form of breast cancer -- estrogen-dependent cancer that has not yet spread -- can skip the chemo, the results suggest. That means about 25,000, mostly older women a year, according to the National Cancer Institute, which helped sponsor the study.
