previous history of breast cancer
, a mass with atypical hyperplasia on biopsy, strong family history or genetic
predisposition (e.g. BRCA 1 and 2 genes), prior radiotherapy to the chest, or a five-year risk of invasive breast cancer of at least 1.7% in women 35 years or older, using the modified Gail model for calculating risk (see http://www.cancer.gov/bcrisktool/Default.aspx). There is no blood test available at present which can be reliably used for breast cancer screening.