Letters Section Editor: Robert M. Golub,
MD, Senior Editor.
To the Editor: Multiple reproductive factors
affect a woman’s lifetime risk of developing breast cancer. Nulliparity
confers an increased risk, whereas the total number of births is inversely
correlated with cancer risk. The biological mechanisms underlying these relationships
have not been fully clarified, although both hormonal and cellular changes
Frank RC. Fetal Microchimeric Cells and Breast Cancer. JAMA. 2004;292(13):1552-1553. doi:10.1001/jama.292.13.1552-a