For carriers with mutation genes of BRCA1, BRCA2 (both belonging to mutation genes of hereditary breast and ovarian cancer syndrome, HBOCS) and ATM, BRIP1, RAD51, RAD51C, and RAD51D (all belonging to mutation genes of other hereditary ovarian cancer syndrome), if they demand for risk-reducing surgeries, counseling, decision-making analysis, then salpingo-oophorectomy only by laparoscopy and long-term follow-up are provided.

for carriers with mutation genes of MLH1, MSH2, MSH6, PMS2, EPCAM (all belonging to mutation genes of Lynch syndromes) and STK11, , if they demand for risk-reducing surgeries, counseling, decision-making analysis, then salpingo-oophorectomy with hysterectomy by laparoscopy and long-term follow-up are provided.

For carriers with any mutation genes (BRCA1, BRCA2, ATM, BRIP1, RAD51, RAD51C, RAD51D, STK11, MLH1, MSH2, MSH6, PMS2 and EPCAM) but refusal to any risk-reducing surgeries, counseling, decision-making analysis, and then long-term follow-up are provided.

Salpingo-oophorectomy are provided for carriers with mutation genes of BRCA1, BRCA2 (both belonging to mutation genes of hereditary breast and ovarian cancer syndrome, HBOCS) and ATM, BRIP1, RAD51, RAD51C, and RAD51D (all belonging to mutation genes of other hereditary ovarian cancer syndrome). Detailed multi-disciplinary counseling, decision-making analysis before surgeries, and long-term follow-up and health management after surgeries are provided for all participants.

Precancerous lesions include serous tubal intraepithelial carcinoma (STIC) and endometrial intraepithelial neoplasia (EIN)

Duration from surgery to death

Incidence of primary peritoneal carcinoma after reception or refusal risk-reducing salpingo-oophorectomy