BRCA1 and serous adenocarcinoma: We have a slightly higher BRCA mutation rate, 28.8% of our ovarian cancer cases diagnosed with high grade serous were BRCA1/2 positive carcinoma when compared with those in other Asian countries, such as study on 207 epithelial ovarian cancers from Japan (Sugino et al., 2019), and a study on 313 epithelial ovarian cancers from Korea (Seo et al., 2019), both showed 20% and 20.9% BRCA1/2 positive in high‐grade serous carcinoma.