Lynparza (olaparib) binds to and inhibits PARP, resulting in inhibition of DNA repair and lethality in homologous-recombination deficient cells, and may be a sensitizing agent for chemotherapy and radiotherapy (PMID: 25028150, PMID: 24225019). Lynparza (olaparib) is FDA approved for treatment of ERBB2 (HER2)-negative breast cancer with deleterious or suspected deleterious germline BRCA mutations, ovarian cancer with deleterious or suspected deleterious germline BRCA mutations and received 3 or more prior therapies, metastatic pancreatic adenocarcinoma with deleterious or suspected deleterious germline BRCA mutations as a maintenance therapy, metastatic castration-resistant prostate cancer (mCRPC) with deleterious or suspected deleterious germline or somatic homologous recombination repair gene mutations who progressed following enzalutamide or abiraterone, in combination with abiraterone in patients with mCRPC harboring deleterious or suspected deleterious BRCA mutations, as a maintenance therapy in recurrent epithelial ovarian, fallopian tube or primary peritoneal cancer and in epithelial ovarian, fallopian tube or primary peritoneal cancer with deleterious or suspected deleterious germline or somatic BRCA mutation, and in combination with Avastin (bevacizumab) as maintenance therapy in HDR defective epithelial ovarian, fallopian tube or primary peritoneal cancer as defined by deleterious or suspected deleterious BRCA mutation, and/or genomic instability (FDA.gov).