http://www.cancer.gov/cancertopics/factsheet/Risk/BRCA - здесь написано, кому советуют сделать этот тест:
For women who are not of Ashkenazi Jewish descent:
two first-degree relatives (mother, daughter, or sister) diagnosed with breast cancer, one of whom was diagnosed at age 50 or younger;
three or more first-degree or second-degree (grandmother or aunt) relatives diagnosed with breast cancer regardless of their age at diagnosis;
a combination of first- and second-degree relatives diagnosed with breast cancer and ovarian cancer (one cancer type per person);
a first-degree relative with cancer diagnosed in both breasts (bilateral breast cancer);
a combination of two or more first- or second-degree relatives diagnosed with ovarian cancer regardless of age at diagnosis;
a first- or second-degree relative diagnosed with both breast and ovarian cancer regardless of age at diagnosis; and
breast cancer diagnosed in a male relative.
For women of Ashkenazi Jewish descent:
any first-degree relative diagnosed with breast or ovarian cancer; and
two second-degree relatives on the same side of the family diagnosed with breast or ovarian cancer.