A Study of Rucaparib in Patients With Metastatic Castration-resistant Prostate Cancer and Homologous Recombination Gene Deficiency

Inclusion Criteria: * Be 18 years old at the time the informed consent form is signed * Have a histologically or cytologically confirmed adenocarcinoma or poorly differentiated carcinoma of the prostate * Be surgically or medically castrated, with serum testosterone levels of ≤ 50 ng/dL (1.73 nM) * Experienced disease progression after having received at least 1 but no more than 2 prior next-generation androgen receptor-targeted therapies, and 1 prior taxane-based chemotherapy, for castration-resistant disease * Have a deleterious mutation in BRCA1/2 or ATM, or molecular evidence of other homologous recombination deficiency Exclusion Criteria: * Active second malignancy, with the exception of curatively treated non-melanoma skin cancer, carcinoma in situ, or superficial bladder cancer * Prior treatment with any PARP inhibitor, mitoxantrone, cyclophosphamide or any platinum-based chemotherapy * Symptomatic and/or untreated central nervous system metastases * Pre-existing duodenal stent and/or any gastrointestinal disorder or defect that would, in the opinion of the investigator, interfere with absorption of rucaparib