The current study aims at answering the scientific question, whether exfoliated cells from STICs get transported into the uterine cavity via the fallopian tube, and whether it is possible to detect those cells in the lavage fluid from the uterine cavity and proximal fallopian tubes. To address this question, the investigators will study 20 lavage samples and their 20 corresponding STIC-positive tissue samples in women who opt for risk-reducing bilateral salpingo-oophorectomy (rrBSO) because of increased risk of high grade serous carcinoma of the pelvis (HGSC) (mostly carrying a BRCA mutation), without a history of tubal occlusion for sterilization. Women who opt to have the fallopian tubes removed but the ovaries preserved are eligible for the study too, as are women who opt for rrBSO plus hysterectomy.
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Detection of "Serous Tubal Intraepithelial Carcinomas (STICs)" in the lavage fluid from the uterine cavity and proximal fallopian tubes.
Timeframe: preoperative