Breast Cancer Study Finds Benefit From Aspirin Use Linked To DNA Profiles

Breast cancer mortality among women who regularly used aspirin decreased 22%-40% for those with unmethylated tumor promoter and progesterone receptor genes, while women with methylated tumor promoter had of 67% all-cause death risk, study finds. Researchers and editorial author say study underscores importance of looking at methylation profiles, or chemical changes, in tumor tissue DNA.