This is an observational phase IV study evaluating Niraparib as maintenance treatment in patients with platinum sensitive, platinum responsive, recurrent ovarian cancer in a real life setting.

This is an observational phase IV study evaluating Niraparib as maintenance treatment in patients with platinum sensitive, platinum responsive, recurrent ovarian cancer in a real life setting. Will be enrolled all patients who have been part of the Italian Compassionate Use Program (CUP) prior to participating in this study. Once the CUP will be closed the trial will continue with th prospective collection of data of patients treated with Niraparib according to the label for 2 years.

Inclusion Criteria:

• patients that received niraparib as monotherapy for the maintenance treatment of platinum-sensitive, relapsed, high-grade serous epithelial ovarian, fallopian tube, or primary peritoneal cancer after response (complete or partial) to platinum-based chemotherapy as part of the CUP, regardless of whether the patient is receiving niraparib at the time of enrolment;
• patients with high grade serous ovarian cancer treated with Niraparib according to the label will be included;
• patients able to understand the study procedures and that agree to participate in the study by providing written informed consent

Exclusion Criteria:

No exclusion criteria

Patients with platinum-sensitive, relapsed, high-grade serous epithelial ovarian, fallopian tube, or primary peritoneal cancer