Ovarian cancer
Ovarian cancers have a mutational defect in "BRCA1" in about 18% of patients (13% germline mutations and 5% somatic mutations) (see BRCA1). Olaparib, a PARP inhibitor, was approved in 2014 by the US FDA for use in BRCA-associated ovarian cancer that had previously been treated with chemotherapy. The FDA, in 2016, also approved the PARP inhibitor rucaparib to treat women with advanced ovarian cancer who have already been treated with at least two chemotherapies and have a "BRCA1" or "BRCA2" gene mutation.