In this study, investigators plan to clarify the frequency of Homologous Recombination Deficiency (HRD) in Japanese patients with ovarian cancer (including fallopian tube cancer and primary peritoneal cancer).~And investigators will also investigate whether HRD-positive ovarian cancer patients show the clinical characteristics of highly platinum-sensitivity and good prognosis, comparing to HRD-negative ovarian cancer patients.~In addition, it is planned to investigate any association between Progression Free Survival (PFS) / Platinum-Sensitivity and germline mutation in Breast Cancer Susceptibility Gene (BRCA1/2 gene) in ovarian cancer patients who can provide the patients' gBRCA1/2 gene information for this study.
To investigate the frequency and clinical significance of Homologous Recombination Deficiency (HRD) in Japanese patients with ovarian cancer (including Fallopian tube cancer and primary peritoneal cancer).