Carcinoma of the breast. ACOG Technical Bulletin Number 158--August 1991

In the United States, breast cancer is the leading cause of cancer death in women aged 35-54. The cause is not known, and 80% of women with breast cancer do not have any of the known risk factors. Mass screening with mammography is the only effective method of reducing breast cancer mortality. Early detection discovers smaller lesions for which breast-sparing treatments may be appropriate. The obstetrician-gynecologist should recognize the breast examination is an integral part of the gynecologic examination.