article_snippet.sent: A Silicon Valley-based start-up tests for mutations in BRCA1 and BRCA2 .
article_snippet.sent: A Silicon Valley-based start-up tests for mutations in BRCA1 and BRCA2, along with 17 other markers, all of which are linked to an increased risk of breast and ovarian cancer.
article_snippet.sent: Women with a mutation in BRCA1 have a lifetime risk of up to 80 percent for developing breast cancer and up to a 50 percent chance of developing ovarian cancer.
highlights_snippet.sent: Test tests for 19 gene mutations linked to ovarian and breast cancer .
  