Durvalumab Treatment in Combination With Chemotherapy and Bevacizumab, Followed by Maintenance Durvalumab, Bevacizumab and Olaparib Treatment in Advanced Ovarian Cancer Patients

Eligible patients will be those patients with newly diagnosed, histologically confirmed advanced (Fédération Internationale de Gynécologie et d'Obstétrique \[FIGO\] Stage III-IV) ovarian, primary peritoneal cancer and/or fallopian-tube cancer. All patients should be candidates for cytoreductive surgery which could be conducted as immediate upfront primary surgery following diagnosis or can be conducted after initiation of platinum based neoadjuvant chemotherapy. All patients should be eligible to start first line platinum based chemotherapy in combination with bevacizumab. The study aims to evaluate the efficacy and safety of standard of care (SoC) platinum-based chemotherapy and bevacizumab followed by maintenance bevacizumab either as monotherapy, or in combination with durvalumab, or in combination with durvalumab and olaparib. Therefore, this study aims to see which combination allows patients to live longer without the cancer coming back or getting worse. The study is also looking to see which combination makes patients live longer and how the treatment and the cancer affects their quality of life.