Young women who smoke one pack of cigarettes each day are at increased risk of developing estrogen-receptor-positive breast cancer, the most common form of the disease, according to a study published Monday in the journal Cancer. Continued efforts to discourage smoking are needed to help address concerns, researchers say.
Current female smokers who had maintained the habit for 10 years or more were 60% more likely to develop estrogen-receptor-positive breast cancers compared with those who had smoked for less time or fewer packs per year, the new study found. However, there was no significant connection between smoking and the risk of triple-negative breast cancer, a more aggressive form of the disease. Researchers followed 778 women between the ages of 20 and 44 who had been diagnosed with breast cancer between 2004 and 2010 in the Seattle-Puget Sound metropolitan area.