Testing Olaparib for One or Two Years, With or Without Bevacizumab, to Treat Ovarian Cancer

This phase III trial compares the effect of olaparib for one year versus two years, with or without bevacizumab, for the treatment of BRCA 1/2 mutated or homologous recombination deficient stage III or IV ovarian cancer. Olaparib is a polyadenosine 5'-diphosphoribose polymerase (PARP) enzyme inhibitor and may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Bevacizumab is in a class of medications called antiangiogenic agents. It works by stopping the formation of blood vessels that bring oxygen and nutrients to tumor. This may slow the growth and spread of tumor. Giving olaparib for one year with or without bevacizumab may be effective in treating patients with BRCA 1/2 mutated or homologous recombination deficient stage III or IV ovarian cancer, when compared to two years of olaparib.

NCT Number	NCT06580314
Lead Sponsor	NRG Oncology Collaborators: National Cancer Institute (NCI)
Conditions	Fallopian Tube Endometrioid Adenocarcinoma, Fallopian Tube High Grade Serous Adenocarcinoma, Fallopian Tube Malignant Mixed Mesodermal (Mullerian) Tumor, FIGO Stage III Ovarian Cancer 2014, FIGO Stage IV Ovarian Cancer 2014, Ovarian Carcinoma, Ovarian Carcinosarcoma, Ovarian High Grade Endometrioid Adenocarcinoma +4 more
Enrollment	880 participants
Start Date	2025-03-12
Primary Completion	2034-12-31 (estimated)
Study Completion	2034-12-31 (estimated)
Updated on ClinicalTrials.gov	2026-08-07