Patients with progressive metastatic castration-resistant prostate cancer (mCRPC) were randomly assigned 1:1 to arm A: cediranib 30 mg once daily plus olaparib 200 mg twice daily or arm B: olaparib 300 mg twice daily alone….BRCA2-mutated subgroups treated with olaparib with or without cediranib were associated with a numerically longer median rPFS.